ok well the I30 in its A33 chassis form is nice. My Dad owns one and its great. BUT We both preferred his A32. Very JDM and actually has some JDM aftermarket parts if she ever lets you touch it. Also noticed a better turning radius. A little more boxy, but very nice. the A33 has the nav, headlights, and new body lines. I30 and I35 with relation to the A33 chassis are almost identical.
My uncle had an I30, and it was very nice, but a little vanilla (read: bland). IMO, I would buy a Maxima SE over an I30, save a few bucks and have pretty much the same car. The I30 might be a little quieter, though.