Forgeline makes some phenomenal looking wheels, and if you're looking for something very lightweight then that would be a good place to start. I've got a lot of the good options listed here and then some if you want to PM me directly -
http://www.camaro5.com/forums/showthread.php?t=387615
If you're looking for similar or better quality than Forgeline, HRE Forged makes great wheels too, some of which are around the same price point as Forgeline, some others will be a higher pricepoint to what Forgeline has, but it's also worth a look -
http://www.camaro5.com/forums/showthread.php?t=385016
Hope that helps!