I guess the good thing about 6spd is that when you push on the gas pedal, you get a better response (of course not 6th gear) due to the closer ratio. If you find two cars' final gear ratio is the same but one has a 5th and the other has a 6th, the 6th should go a little faster in acc, but then the top speed will still be the same.

I knew a lot of people drive 5spd do not shift to 5th unless hwy. I think it is either they do not want to speeding (Driving my 240sx thinking I would save some gas for shifting 5th gear asap is a wrong idea because I usually ends up at around 55 to 60 on Pleasant Hill) and/or they want better response from the car.

Some of my friend driving 6spd will never, ever shift to 6th unless they are on hwy because once you shift to 6th, you can not acc. You push you right foot all the way down the floor and the car may need like a min to acc 5mph.

However, some people says 5spd goes fast on turns because the rpm does not go down as fast as the 6spd.

Anyways, I love my 5th 240sx but I would still go for a 6spd if I have enough money.