Im on the fence about montreal GP, i live in west canada... i might be banking that cash to go to monaco gp next year.
My old friend at work had a 3.6 with straight exhausts and intakes and holy fuck did that ever put the exhaust of a cammed v8 to shame. 993 is a great mix of long term driveability and performance, I dont think i could sit down town in one though... the clutch is naturally too stiff for my DD liking and can be a bit cumbersome to sit in for extended periods of time. None the less, 993 are fucking badass cars. I Was eyeing up an idea to get a 996 c4s in a couple years but I figure ill end up with a 355/348 or a nsx-t. I do love my k20 car though, such a perfect engine from engineering standpoint, so much fun to daily drive... atleast take it for a rip. Out of the 3 cars you are scoping out, the least fav of mine is the e36, it just didnt do it for me when I drove one... e46 was fairly fun though. Let me know if you need any factory info for your car like torque specs and wiring diagrams, can snag them from work.