I dont have a whole lot or experience behind a half or full stack but I have played thru a JTM45 w/ 1960TV half stack and was blown away to say the least. You get a real bawlsy howl like Angus and banshy screaming highs of the likes or Slash and such.

Id just recommend going to your local music store and plug in to a bunch and find one you like. If you're planning to spend that kind of cash, you'd want to make sure you're really getting what you want as far as tone and features.

Hope that helps! Oh, and buy your neiborhood some earplugs for Christmas cause if you're gonna use this at home.... you get the idea ;)