Back on the topic of the engine (which I can't vote on).
I think it could be a good thing. If it's lighter than the V8 and makes good power than sounds good to me. Also, a boosted engine would mean that it would make good power from mods and you wouldn't have to dish stupid amounts of money to tuners like Dinan for an extra 50hp. A tune only 335i makes pretty good power and the parts don't cost an arm and a leg.
It won't have that sweet V8 sound, but a V6 can sound good too (unless Nissan makes it). LOL/JK