Fwiw, I'd look at a 997 turbo over a v8 R8 everyytime for the money, but they're not without their pitfalls too
Buying a Porsche can be a minefield, so go into it with your eyes open and do some research
Loads of things to look for that you don't get with Audis, including over Rev records etc
Pistonheads has a pretty decent resource for 997T buying
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Gone - 11/06 B7 RS4 Avant - black/black (Daily drive & kids taxi)
Gone - 05/13 B8 RS4 Avant - Suzuka grey (Daily drive & kids taxi)
Gone - 01/14 B8 RS5 Coupe - Short term car
Gone - 09/14 B8 RS4 Avant - Misano Red/Ceramics (Daily drive & kids taxi)
Current - 04/18 B9 Rs4 Nardo Grey
ZX10R Race bike - 210bhp and a few skid marks on the seat
A mate of mine is well into his Porsches (had an original 911 and a very rare RS Lightweight!) so im taking pointers from him.
But tbh, I still really fancy an R8...maybe have one for a year then go 997. I'm working on the belief that R8 prices seem to have bottomed out whereas the 997's are still depreciating (slowing down though I think).
I'd rather have a V8 R8 than a 911, yes a Turbo will be faster and probably faster than a V10 tbh but a V8 is fast enough for everyday use. You need to drive both, nice decision to have to make.