Yeah, I tested out the Diablo 3 Open Beta, and - just at a first glance - it doesn't seem too great. It's well-made and everything, but with such a limited beta, it's hard to tell what features are actually in it and what the end-game content and whatnot is like.
And yeah, I haven't committed to buying either of them yet. I really want to try out GW2 beta before I commit to buying either of them.
I completely forgot about Torchlight 2, too, and that was one of the things I wanted to buy. I never personally played the first one, but I heard good things about it from my brother.
And GW2 just seems better from just looking at skills. It seems more dynamic and exciting. zzz I should really try D3 again, though, since my very first Beta experience was quite... unnatural.