I just purchased a set of 25mm for the front and the rear last week. It think the rear is good but I'm not happy with the front. I'm probably going to dump the front set and look for a set of 15mm. For me its simply the look; preference. Actually I'm going to look at the car a little closer and may even go 15mm all the way around. That said, I don't want to do any stud replacements. If I can use the stock studs, I'll look for the 15's, if not, I'll go less or none. My opinion of course.
ANOTHER THOUGHT: I would have guessed you could not do different spacers due to the TCS? Apparenty you can. Although it is a very small distance different I figured there would be a slight variation of wheel speed on corners. Of course I'm saying this under a guess that the NSX monitors wheel speed for its TCS and I'm presuming it looks at all four wheels. I don't have any idea how it works in truth.
NOTE: I'm looking at the pictures of the red NSX and I could swear mine are out a bit further on the front. Must be an illusion. That pick works for me.