We just got finished putting a Z1 in a new Acura TL. This was a really fun one since I had to custom fab the brackets and trim rings for the radio. Considering what we had, I think it turned out pretty decent.
The install consists of a Dec 06 Avic-Z1, ND-BT1, GEX-P10XMT, CD-R5, CD-SR1, CD-iB100ii, 2 Kicker 10" Comp VR subs, JL Audio 6.5 separates in the doors and JL Audio coax 6.5 in the deck, Pioneer GM-5200T bass amp bridged at 380 watts RMS, Pioneer GM-6200F mid-high amp at 60 watts RMS x 4, Pac SWI-X steering wheel control, Scosche.5 Farad cap, Scosche power wire/distro blocks, and Monster Cable interconnects. The tweeters for the separates are in the stock locations on the dash, and the XM and GPS antennas are mounted on a custom panel screwed to the bottom of the stock center channel grill. XM and GPS signals are great.
As you can see, the components aren't super high end, but it still sounds great.