Where to shop for new wheels/rims?

[Alexalex]

Where can I go for a good large selection of 17 in rims? I prefer something that has at most 5 spokes so that the brakes inside can be seen when the car is moving.
What is the maximum width of rim and tyres that can be installed without the tyres rubbing on the fenders when the car has a full load and hits a small bump?
For the E90 320 with standard suspension.

Thanks.