I beat the game the first time around with a monk, and have proceeded to Act III hell without much difficulty (now is where I’m getting really slowed down), however I just beat normal with a wizard in about 4 hours start to finish. They do crazy AOE DPS so long as you don’t mind kiting a bit..
Also, once you get to inferno, the only people who can tank anything are a special build of wizards. Interestingly, they’re still the only ones who can do any real damage at that level, so I’m betting they’ll be nerfed soon as inferno is pretty much wizard only right now.
Also, gems + AH are ridiculously bugged right now.. really hoping they fix that soon 🙁