I'm 6'-04" & 230 lbs and the only cars I considered were the Datsun Z in ITS and the BMW 2002 in ITB. The 2002 had more room, but I already had a good supply (!) of Datsun spares and more are easy to find compared to a 2002.

I never test fitted a 325 (e30 or e36), so no comment there.

BTW, I just barely make it in the Z, with an aluminum seat mounted directly to the car.

EDIT: Let me rephrase that first sentence. I only considered two cars (Datsun Z and BMW 2002) because most of the reasonably competitive cars I could afford to race were too small for me.