The lightest non-custom offering's in our bolt pattern are the Centerline RPM(13.5 lbs, yet I've heard lighter when weighed in person), and the Weld Racelite RS-11.7 lbs.
Both wheels are in the $275-$350 range for a 17"....
2002 ZO6...462whp/410wtq
pretty darn fast!11.70 @ 122
silver/black
2006 Trailblazer SS(wifes car)
silver/black
2000 SVT-Turbo-sold
silver/blue #1699/2150
13.83 @ 102.82 on 5psi
13.51 @ 107.56 on 8psi