White GT3 with black wheels looks yucky. Would rather the standard silver wheels.
That said, for all its monster presence, the GT-R just looks too bulky in the company of the perfectly proportioned GT3. The GT3 just looks like its designed to flow with the forces of nature whereas the GT-R looks like its designed to bash those same forces into submission.
Anyhoo, I'd have either or both in half a heartbeat.