Whatever you do, don't choose red for the exterior color. For a grey LP640, black rims, yellow callipers, here are a few interior suggestions...

1) All black with yellow stitching

2) Black-White seats

But I like carbon fibre cosole and glass engine cover for the LP640 and J-Wolf, I'd suggest a Maserati GranTurismo for the looks, the Audi R8, a Zonda, a DB9
or a Lamborghini Reventon (Maybe not)