Biter,
I would completely disagree with doing ANY mods. I also do not think you should replace your shocks at the mileage you describe. The NSX is more then capable completely stock at the level you are driving at. I would do the following:
1. Replace Tires and Check alignment
2. Flush ABS and Complete brake system (DOT4 in main system, DOT3 for ABS)
3. Replace pads (I would use a Cobalt Friction GT Sport, or the like based on your driving experience) and service rear calipers
4. Keep going to driving school
Just an FYI, when my pads are cold, I get some of this too, especially on a cold day.
HTH,
LarryB