HU - $300 - Nak
Components - $150 - Focal upgrade special from www.zalytron.com
Amp - $120 PG from www.etronics.com
Sub - $200 Lambda PB 12" www.stryke.com
Sub amp - $200 many to choose

Rest for install. That would be a killer setup, with some good tuning, could try SQ competition.