I will be the first to say that turbo cars and supercharged cars with the same power are not the same. All power and torque being equal I would probably choose a turbo if it were reliable. I am with NetViper on the reliability aspect. That is part of the reason I have the parts I have(and I bought the car with the autorotor kit on it). However, I have driven a 580whp NSX locally in a straight line and loved it. A lot depends on the power curve and when it hits. This same turbo car had mass amounts of torque early in the rpms and made it very hard to drive before. The car is much more controlled with the new turbo and powerband. I do like the twin turbo idea since many cars have made that a staple of good engineering straight from stock, i.e. the GTR and BMW 335 are both good examples of that. What turbos do have that I like is good charge air temperatures compared to that of a supercharger. Most turbo kits for the NSX run air temps in 90-120 range I believe. My stock CTSC will run temps at 260 degrees or so. If you add the laminova it does temps of 165 or so. That is better but still not close to a turbo kit. Turbos are nice since they run straight off the exhaust gases pushing the turbine. So it is free energy to some extent. Superchargers have to be turned by a pulley to work. Superchargers are good for those that like predicable power with no lag as well.
One thing I will add is I visit the track and I don't believe that 500whp+ is as usable on the road courses for the mortal people that are weekend warriors. Billy Johnson can handle those cars but I wouldn't recommend it for other people. If you want to blast off in a straight line than get a Supra, Mustang or Vette I say. It will be cheaper to hit those high up numbers without destroying your engine block. A corvette can do 600whp on a stock block pretty easily I imagine.
Don't get me wrong, I love both types of cars but for different reasons. I actually haven't driven my NSX at the new hp numbers But I pick it up next Wednesday. I had quite a few mods done at the same time since I drove it down to Science of Speed. I will then have a twin turbo and a supercharged car in my garage to compare. The biggest difference between the two cars is the handling above all. No comparison there.