Hi nodz. I've read your post and all the comments with interest as I had the same problem with fitting into the boxster. Mine's a 987S 3.2. What none of you have mentioned though is that the 'fit' of the seats has nothing to do with the height of the driver but rather it's to do with leg length! I'm 6' 2" but I have long legs (34" inside leg) and simply cannot get a comfortable driving position in 'standard' seats, sports or otherwise, in the 987. The 'almost comfortable' answer for me was the expensive option of electric seats which allow the rake of the seat, as well as the height to be adjusted. By having the seat base as far back as it will go and tilted fully back, with the seat back almost upright, I can just get my legs in and my knees will clear the steering wheel - just! I also have big feet, size 12/13 and can only drive in Sparco racing shoes, but that's another story. Suffice to say that 'heel and toe' is a no-no. So you were correct in your original assumption and my advice is to try a car with electric seats and see the difference.
Critch
Critch