Also check out the 2008 Clarion decks. Like the 585 or even the 575 (which is a '07 series). They are good decks and it will make a very big difference in the sound. They are well in your price range, I'm blowin out my last two for $200.
http://www.orioncaraudio.com/Promos/HCCA_C...ge_Results.aspx
Have your buddy check these videos out. I personally like them alot. They got some big Xmax and can handle some HUGE power.. Good luck