From my experience, I've always found it better to buy the car that I have the more emotional experience/connection with.  If it's not a question of money, I would go for the Turbo hands down.  Having owned both a 997.1 C2S and now a 997.1 Turbo Cab, I can tell you the driving pleasure I get out of the Turbo is exponentially higher.  I don't track or race my car, but every time I do punch the accelerator (even if only for a couple of seconds), it never fails to put a grin on my face.  The Turbo is bulletproof.  I use it as a daily driver without issue or hesitation.  For me, I also prefer the design of the Turbo over the normally aspirated cars.  The wider stance, wheels, and body trim accentuate the heightened performance ability without being too over the top.  The best advice I can give is to arrange for a back to back test drive for both cars.  I promise you you'll have your answer, either way!


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2009 Porsche Turbo Cab - Cargraphic exhaust, HRE P40's charcoal