I was eyeing those wheels a little while ago.. in fact I was ready to buy them! $1350 for 4 rims no tires. But I fell out because they olny come in 35mm offset. on your or my car that would make the wheels sit deep in the wheel wells. The E30 needs a 18-25 mm offset for a proper look and handling. You CAN buy spacers but with a 10 mm spacer you need longer bolts and it just get weak and exspensive ($60 each for bbs spacers)
My advice is to keep looking for the right offset. Check out www.team-dynamics.com
I ordered a set of Motorsports in hyper silver (close to the new factory bmw rims and the action sport finish, looks great on silver bmw's) let me know if you like any of them I can get a price for you at discout from Wheel and tire zone. If you hurry you can catch the boat, it's 5 weeks delivery from england. the 17's are around $1600 for 4 rims.
Hope this helps
E30 Stuff For Sale: Clutch Fan and Shroud, 4 Pack Ignition Coils, ATE 750il MC (New), Offset Trailing Arm Bushings, m42 Valve Cover (Clean), M10 Engine Mounts (New), M42 Injectors,