I'm keeping my cross spoke rims.
One thing I was really excited about when buying the car. I remember seeing older BMW's with rims like that before and really liking them.
The 335 rims might be lighter or more offset but I don't really like the style all that much.
I'm sure you'll have no trouble finding someone to trade or buy your 335 rims though. We seem to be in the minority as far as prefering the cross spoke rims.