Boston mids and highs - good, but could do better dollar for dollar with the likes of "unknowns" such as Vifa, Peerless, Scanspeak, etc...
Audiobahn amps and subs - All show, not much go. You can do much better here unless all you're after is a bling bling type of system that impresses the eyes and not the ears.
Phoenix Gold wiring - pay a third as much and get better quality stuff from
www.knukonceptz.com (Bill, the owner, is also a fellow CEG'er).
Alpine CDA7894 - Very nice HU. It's tough to screw up here as long as you stay with the likes of Alpine, Clarion, JVC, Pioneer, Kenwood, Eclipse, Blaupunkt, etc... and get a deck with the features you want and room for expansion (anything but Sony Xplode junk)