I have driven turbos, GT3s, GT2s, etc. etc. for me, I prefer the GT3. The turbo has, dare I say, too much power? The turbos spool so fast it's like an on off switch which makes spirited driving a little less fun (for me anyways). Whereas the GT3 is much more linear in it's power delivery. The turbo does have a more comfortable and compliant ride though, which is better for touring. As a DD, I would go with a C2S though as I don't like the clutch take up on the turbos or any of the GT cars.
Money aside, GT3 RS 4.0