Best Driving Suit? Nomex or PBI/Kevlar?

[Tom and Vipers]

Need to get suit. What to get....

GForce advertising said PBI/Kevlar breaths much better than Nomex and is now the choice of Fire Departments...

Of course this sounds good - they are trying to sell me a suit.

Any suggestions out there?

I am interested in comfort and Big Time TPP rating. (The Kevlar seems to offer both for about $400.)