A few thoughts from my end, food for thought:
a) If you drive your car a lot (DD) a big high wing will definitely attract more attention from anyone (LE, spectators, ricers, etc)
b) I believe Dhalsim, Batman and all the other guys with big wings have extensions on them so they sit about 4-5" higher than mine. Their wings do not block their rearward vision because essentially it's the same height as their roofline.
c) In my case, even though it's better than the R-wing, mine still blocks some rearward visibility. I have mine set at "middle" height meaning it can go higher but it will never reach atmospheric height like the race cars! haha
d) Quality of the APR is superb! Fitment is spot on using OEM holes so you can remove it anytime. If I had to drill holes this mod would never have happened.
Since I've posted this thread quite a few of you guys have installed larger wings including synth with his famous Imola. The look is really amazing on the NSX stock body or not. Check out his photos or maybe he will chime in here.