So I think 335xray got the replica version of the stock rims that are just like these but in the regular finish.  That should be a 9.5" rim up front and 10.5" rim in back.  Then did 275/45/20 snow tires on all 4 rims.  I know that will make the back tire appear a bit stretched on the rim but should help keep it from getting too wide.  The pictures in his 
THREAD don't look too bad either (stretched or narrow in the back).  I sent him a note to get feedback.
 
The black rims with Platinum Gray should look different and fun.  That way I fill out the wheel wells almost as good as in stock trim, get to have the wide rims/tires in the summer and then have a better compound tire in the winter for around $2,000 extra.
 
I just realized my truck tire on the stock rims that I bought new winter tires for this year are 275/65/18.  I believe that would make them the same width (275) as the tires 335xray used.  Which means I shouldn't be too wide in the winter.
 
 20" BMW X3 X5 X6 Matte Black Wheels Rims E70 E71 E53 - eBay (item 300539308283 end time Apr-20-11 09:52:10 PDT)
20" BMW X3 X5 X6 Matte Black Wheels Rims E70 E71 E53 - eBay (item 300539308283 end time Apr-20-11 09:52:10 PDT)