Despite what Nick says, the 997TT has better depreciation according to the latest EVO magazine (with Alfa 8c on cover). The depreciation rating for the F430 is 3/5 and the 997TT is 5/5. Also interesting is the running cost of the F430 is 2/5 and for the 997TT it's 5/5. Reliability it's a tie at 4/5.

I'm attaching a pic I took with my cell phone.

David