Well my entire system including headunit, amps, speakers, subs, and wiring is going to cost about 1K.
Some really nice component sets are MB Quart QSD's(if he likes a very detailed metal tweet)
Focal K2P
Arc Audio ACS265
Image Dynamics Chameleons
Boston Z6, Boston Pro
JL ZR
For a good amp to run them using the passive components, I would suggest the MB Quart RA2400 at
www.crutchfield.com It's 200 watts rms x 2 @ 4 ohms. and is 249 shipped.
Get a second one for a pair of Peerless XXLS 12" subs
http://www.madisound.com/cgi-bin/ind....1621&pid=1789
For wiring, check out partsexpress, knukonceptz, darvex.
For deadener I rec.
www.raamaudio.com