take a look at the FAQ - wheels - there is a link in my signature below
for bargain price wheels, there are the BBS RA wheels, which come in 15" and 16" (similar style to the RS but one piece - generally can be found for 100 to 150 each. there are a number of other wheels. you might want to consider the coupeking alpina style wheels - around 1600 for the set of 4. you can find 17" BBS RC090 2 piece wheels for between the price of the RA's and the RS's
fyi - BBS RS are running around 3000 to 3500 for the set. true Alpina 16" are similar range.