Spoon,
By now everyone has to know I am ANAL about low weight wheels, damn fine setup you have there!
Other than adding more power, which only helps in acceleration, what you did is the biggest overall performance upgrade there is and it helps in everything about real performance.
For those that cannot afford or find a great deal on Rays/Volks, which I have done in the past as well, there is the killer bargain priced Konig options in 4x100 and the 6UL, 15x8, 9,10, 11 wide depending on your needs, wants, mods to make them fit.