[843two]

I drove the 35 and 28i when deciding and while the 35 was definitely faster I decided that coming from an E36 M3 track car and modded Audi that I didnt need the extra power. Now, I find that the 28i is more than enough for the street and probably will get another track car before taking it to the track so really the extra power is irrelevant but if it's your only car and you don't have a track car or bike (as someone mentioned) then maybe the 35 is for you. I personally felt like the 28i was more balanced in cornering and not too much slower in a straight line. I think a JB4 tune would be more than enough to make up the power gap given the weight difference.

Like others have said, drive both and make up your mind because what I say, feel and think may be completely different from your experience with either car. You cant go wrong with either.