I am a bit saddened by petty bickering among car enthusiasts. The fact is that the NSX is a great sports car, just like all the others mentioned earlier. I lived a few years in Italy and I love Ferrari and Lamborghini as well as Porsche and all the others. But they have flaws like any other car. Ferraris are fragile and expensive to care for and Lambos even more so. A true fan of motor racing or any kind of racing will appreciate what the manufacturers are striving for, and that is variety. Without that we would not have all of these comments. Heritage is only what one makes of it, and Honda certainly has done just that, just look at the Indy Carts and Juan Mantoya's success. In F-1 we got McLarren and Ferrari battling it out with hopes of Michael Schumaker's comeback. The one person putting down Richard Petty or Jeff Gordon, doesn't know what he is talking about. Richard competed in over 1000 races and won just as many times. Ferrari was trying to get Jeff Gordon as their second driver earlier this year for a reason. As a child I watched Nikki Lauda drive his hart out and crash. Arton Senna was great but within a few years Schumaker will will be even greater. It is not about cars or even drivers, those come and go. It's about competition and the thrill of the race.
Corvette or Vipers redneck cars?, pal the Corvette was built in 1953 (from plastic and carbon fiber in those years) and sold every year since and it has heritage coming out of its pipes. In 1990 a stock ZR-1 Corvette (0-60 mph in 4.2 and a top 190+ with no cats) set 15 FIA sanctioned endurance records off whom only 2 were beaten by a Ferrari Maranello in 98. 
Viper was designed with the help of Carol Shelby same one who made the Cobra 427 ( 0-60 mph in 4.0 sec in 1962-65) and the same one who won LeMans. Than there was a car called the "Immortal" Countach 25 years in production flowed by something Devilish. Porsche 911 has been running since the 60s too, and sold more than 300,000  of them (more than any supercar), while the NSX is only starting its greatnes.
Want HP per Liter look no further than a stock Bugatti EB110ss with 174.57(0-60 in 3.3 and top speed 218 mph) or F40 with 162.
I grew up on Ferraris (512 TR), have come to love Corvettes and appreciate the NSX and now want them both.
My point is that all the sports cars are wonderful and everyone will find at least one to like or admire. Ferraris have Enzo's soul, Lamborghini has the aura, BMW the engineering, Corvette is the American Icon and the NSX is a true GEM.