It's pretty much all been said, but I will chip in with this:
I'm at 6062' above sea level. At this height, forced induction is NICE. I'm a Chuck Norris roundhouse kick away from Colorado's premeir ski resorts. AWD and forced induction is EVEN BETTER. But I'd still rather have the Z. I don't need a back seat for this car, and the hp it'll give away at altitude it will more than get back with its appetitie for the twisties. And heck, I've got my '01 S4 for the ski mountain runs anyway. So... 135i? Tempting, and though I like the overall look of it, it just misses for me somewhere. Probably the fact that it's really only playing at being a 4-seater and wasn't quite the 2002 reincarnate fans imagined it was going to be. Camaro? Talk to me when you can get it to lose 500lbs, GM. Seriously, a 3800lb car? Really?
It's down to the Z, the M Coupe, and the Cayman S. But I can only afford the price of one of them. From what we've read so far, think I'll miss out on much?
S.