Well I'll chime in here... CSCobra, I have the 3.54 rear with the TKO .64 OD and I think it's absolutely perfect (for me, that is). That combination has the first four gears right where you want them for either non-highway street driving, tracking, or "spirited driving" and the .64 OD gives me 2000RPM at 68MPH in fifth. The
only thing I use the fifth gear for is pleasant, relaxed highway cruising. You can actually chat with your passenger at 70MPH because the wind noise is louder than the pipes. If I was in fourth gear at 70MPH I would be turning 3300RPM -- that's a big difference. Your trans/rear/tire-size numbers are something you really want to think through and research -- it will make a make a big difference in how much you enjoy your car and changing them after the fact is a PITA. Not impossible mind you, just a PITA, so you might as well do it right the first time.
