There are lots of options available for a car with these mods. I am running a SPEC Stage 2+ clutch and steel flywheel in my 05 G35 Sedan and it is both very drivable and torque capable. I have provided a link to the website for these parts below. Take a look and let me know if you have any further questions. Thanks,
http://www.specclutch.com/cars/Infiniti/G35/2005/Single