I bought some new wheels and tires from tirerack.com.  They are the  TR Motorsports C1's (15X7) and look pretty nice.  I also purchased some Kumho Ecsta ASX tires to go along with them.  They seem pretty decent and so far do a pretty good job in both wet and dry situations.  They are a nice step up from the 14" wheels that came with snow tires.  The difference in traction is huge.

New wheels + tires

89 BMW 325i with new wheels and tires