So I've tried out the McLaren F1. This is what I have to say for it: This is the one.
Even with tuned-car-level aerodynamics (Ok, ok. I know I put a lot of emphasis on aerodynamics but hey how can you not ignore it if it increases your cornering speed
while going faster?), the F1 feels just like the NSX, except that it's more obedient to corner exits (I'm using tunes though so maybe it's a different matter on stock suspension settings) and has a better powerband so I can have my revs low without bothering much about my acceleration (Don't ask why I sometimes have my revs low)
I also have the McLaren F1 Stealth Model but I'm convinced that my pre-1.09 tune (Couldn't find a decent updated tune so I settled with Praiano's) is not being of much help. Right now it has about the same performance as my other F1 albeit with slower top speed
As for the Amuse S2000, using HKS racer's advice, is much faster. However, I found that for me the fastest is the rear aerodynamics of the car being low to unsettle it just a little bit, making it tailhappy and overreactive to snap steering. I didn't mind though, because it becomes an NSX killer if I master the driving style needed for this car
The ZZII is a bit of a mixed opinion. Overall it's very fast, but in some sections of the Nurburgring where I test the cars, it gives off some understeer. You see, I tend to measure the car at the first sections if the track (The first corner which is low speed, the first sweeper, which is mid-speed, and the left-hander just before the "nose" of the 'Ring, which is high-speed) and base how fast I should be going at the rest of the 'Ring from it. At most cars this technique works but in the ZZII when I measured the three I thought it's faster than the NSX at low and mid-speed corners, with the NSX being faster at high-speed corners. But then at the second part of the 'Ring it understeered at a low-speed corner (I was going as fast as how I should be in the NSX) so it was really a surprise.
In the end I'm not sure how I'm going to rate this unpredictable car but I think that should I master this car it can be much faster than the NSX
