I would go with the lightest wheel you can find in your price range. Of course tire price and availablity is a factor.

just another bit of info:

Full tread 205/50R15 RA-1 - 20lbs
4/32nd shaved RA-1 - 18lbs
2/32nd shaved RA-1 - 16lbs
205/50R15 Hoosier DOT Wet - 17lbs
225/45R15 Hoosier R6 - 19lbs
245/40R17 Hoosier R6 - 22lbs

for every 1 lb you save in wheel weight it is like taking 20lbs out of the car.....goes for tire weight also

example 1lb each wheel x 4 = 80lbs