US 3G is nice, as I mentioned in my review, linked in my sig. However, for me, I was hoping that it was good enough to get me past my dislike of flips, and it didn't. I was also hoping it would help me look past the lackluster 2MP cam on the N75 (as compared to my precious N73's 3.2MP killer) and it didn't.
I'm holding out for a better-spec'd device with US 3G. If you're coming from say, a 6682 or something similar, then yeah, the N75 would be clutch. But stepping down in nearly everything other than data speeds, it wasn't worth the sacrifice, IMO.
As for N75 vs. N95, I personally am saying neither (having had a chance to have both, now). It's so early in the game for this year. And with the N73 being Ngage compatible , and the new S60 FP1 browser coming available in a download in a month or so, I'd rather wait.
Plus, April 9th is basically D-day for if there will be any more US 3G devices in the States from Nokia (courtesy of Qualcomm). I personally am sitting back till about September, and enjoying my N73 along the way.