Wow! Way to bring back an ancient thread instead of doing a new one and for using the search option!!!!
Anyway, I will tell you which ones to get ASAP in reguards to the Animated Classics. (I'm just assuming that that's what you're refering to. I don't know that much about Disney's live action DVD's anyway...) So, I will make sort of a list for you on the animated Disney DVD's that I believe you should get ASAP:
One's you should get as soon as humanly possible in a store near you:
- Bambi PE (It was put back in the vault January 31st 2006, and the numbers are decreasing.
- Lady and the Tramp PE (same as Bambi)
One's you should get very soon in a store near you:
- Aladdin PE (this set is honestly overdue to go back to the vault. I believe that it will become OOP next January)
- Cinderella PE (I'm just about 100% sure this set is going back in the vault this January and because it's a princess / fairly popular film, once it goes OOP, it will become difficult to find and expensive)
- The Little Mermaid PE (same as Cinderella, though not entirely sure it's going back in the vault this January but it's very possible)
One's you may wish to get if you can find them used or bellow $30:
- Snow White PE (this is the first, and arguably BEST platinum to date. While you may want to wait for the new edition coming around 2009, it may not get much better than the current edition. I personally found my copy used at a Gamestop for $17. If you can find one at that price, I HIGHLY recommend buying it).
-Beauty and the Beast PE (while many people might disagree, I also think the BATB PE is one of the better platinums with lots of bonus features and most importantly, the Work-In-Progress version of the film!)
-The Lion King PE (I might recommend you to just forego this edition just because it's not as great as it's predesessors or others after it. However, if you do find it used or for around $25 or less, I would recommend buying it).
- The Emperor's New Groove CE (I HIGHLY recommend getting this "Ultimate Groove" Edition of TENG if you can find it. It's loaded with bonus features comparable to a platinum with an amazing transfer and everything. However, it is pretty hard to find but it's unlikely to get a new 2-Disk SE of TENG due to the fiasco that was the "New Groove Edition." However, if you can find it for around $30, don't hesitate to buy it!!!)
-Tarzan CE (Same as Emperor's New Groove; hard to find, but very worth it if you can. Honestly, this is the main Disney DVD I'm searching for at the moment).
- Atlantis CE (I know many here might not like the film, but in case you might, this set is loaded with bonus features about the film and is worth the money. However, I would only pay a maximum of $20-$30 new for it).
(-Sleeping Beauty SE (While the new platinum edition is coming out Oct. 2008, I really believe that it will be nothing more that porting everything over from the special edition on to this new platinum. This set is amazing as it is, and if you can find it for around $20-$25 used or new, I would recommend buying this edition and possibly foregoing the new Platinum coming soon. But I'll leave SB up to you, hence why it's in parenthases).
One's you might want to get whenever it's possible. However, it's not that urgent:
- Pocahontas SE (A pretty good set. However, it doesn't appear that this 2-Disk SE is going OOP anytime soon).
- Mulan SE (Same as Pocahontas).
- Alice in Wonderland ME (same as Pocahontas and Mulan).
- Fox and the Hound 25th Anniv. Ed. (fairly good DVD, considering the film is not one of the most popular of Disney Films).
- Robin Hood MWE (same as FATH).
- Dumbo BTE (despite the fact that Dumbo deserves a 2-Disk treatment, the sets that it has now has a fairly good amount of bonus features).
One's I would forego buying at the moment unless you have a real desire to have them now:
- ALL "GOLD COLLECTION" TITLES (Sword in the Stone, Great Mouse Detective, Rescuers, Hercules, Hunchback of Notre Dame, Oliver and Co., Black Cauldron, Rescuers Go Down Under, all package films, etc) (In my opinion, all of these films are very likely to be rereleased in better, even possibly 2-Disk editions in the future. At this point, it would be silly to buy these with the very large possibility of new editions in the near future).
- Fantasia 60th Anniv. / Fantasia 2000 / Fantasia Anthology (While the Anthology set is AMAZING, with the new Platinum coming up, I don't think it's really worth it to track down a set as hard to find as the Fantasia Anthology. Just hold off until the PE).
- 101 Dalmatians LI (Unless you're a big fan of the film and gotta have it now or you are a completionist and have to have the film in it's OAR, then just wait until the PE coming this March (in one year). Then you can have a set with actual bonus features!!!

)
- The Jungle Book LI (Same as 101 Dalmatians. Especially since the transfer on the DVD of TJB is a little worse than the VHS!!!!)
- Pinocchio LI / GC (Pinocchio is coming around 2009 in it's new Platinum Edition. 'Nuff said.)
- Aristocats GC (rumor has been going around for a while that a 2-Disk SE of Aristocats was coming in March of this year. However, it has been put off (obviously) until March 2008. Hopefully, it will still be a 2-Disk!!)
-Lilo and Stitch (Same as Aristocats, although the 2-Disk LAS has kind of dissappeared off the face of the earth...)
-The Many Adventures of Winnie the Pooh 25th Anniv. Ed. (A new edition is coming out in a few weeks. Just wait until 6/19 to purchase this title).
Wow, that took a while, but I think I covered everything. Hope everything with your collection works out! Write soon!
-BB