If money is no issue, the 335i would be hard to beat. I've never lived that sort of life, though, so I can't relate to the thought process of not factoring in price. And so I'd just point out that the 335i is extremely expensive--about $10,000 more than a G35 when similarly-equipped, if I recall correctly. If he's as rich as you say, than he can just ignore this post.
As for the 328i, which is comparably equipped with the G35, it may have slightly more refinement but the G35 has about 80 more horsepower. Different strokes for different folks.