Havent read anymore of the thread since I replied, but here is a quick breakdown if you buy stuff used when you can. These prices are either new or just below brand new. This would be as good as a stereo system you could get before you get to the level of pure insanity... And still costs around $2,300. I really dont see much need for anything any better than Focal K2, Polyglass, Pioneer PRS, and Alpine PDX amplifiers. There is honestly just no need IMO.
Headunit/Source - Pioneer DEH-80PRS - $300
Front Stage - Focal 165KR - $450
Subwoofer - Focal 33V1 - $350
Amplifier - Alpine PDX-9 - $450
Deadening - Sound Deadener Showdown - $500
Wiring/Interconnects - Stinger - $150
Enclosure/Install Materials - Wood/Paint/Screws/Glue/Etc $100