I've never encountered a problem with my Classy 3 (aside from the absolutely beastly NB heatsink/fan combo)...and I'm about to drop an i7 970 into it.
Newegg has reviews on the E770. There's got to be a reason for it to sell out really quickly after launch. I know there are other E770 owners around OCN...look about, ask opinions.
edit: you already own an RIIIE I take it...why bother changing out a great board?