I am very disappointed to hear about barb in late hell/inferno, he's such a beast pre hell and even on the first two acts of hell seems pretty well balanced. Everyone and their mom is saying they suck in inferno, though, so I'm inclined to believe.
Wizard... they just aren't totally fun. I mean they are cool but nothing beats the pure power of the barb, it really sucks he is so badly balanced "end game".
It's either a wizard/demon hunter for me.
edit - it reminds me of the operative on SWTOR. Everyone said the operative was great 1vs1 and solid up until level 50, but at 50 in PvP and PvE, he sucked a lot compared to other classes. I was like meh, it's prob just skill based it'll be fine - no, no, that class totally freaking blows at end-game (I don't play the game anymore haven't for a long time).
Now on D3 I'm like meh, it's prob just skill based it'll be fine, but more than likely barb is actually gimped, and I don't want to hair-pull my way through heal until he is fixed/more gear comes out.