Howdy WolfSong! I like the direction of your project, so please keep posting progress pics.
I'm in the planning stages for my SQ setup, and building a parts list. If you had any guidance, it seems like we're on similar paths.
These 4 items would be stashed in a case:
12V input ATX power supply with buck-boost (or similar)
http://www.mini-box.com/DCDC-USB-200?sc=8&category=981
MiniDSP 2x8
http://www.minidsp.com/products/mini...2-x-in-8-x-out
41Hz AMP9 (low profile) for mids and woofers. Made one before, and it's very possible for the patient among us.
http://shop.41hz.com/shop/item.asp?catid=13&itemid=27
41Hz AMP32 for tweeters
http://shop.41hz.com/shop/item.asp?catid=42&itemid=38
And a couple class D amps for the requisite sub-bass in stereo would be mounted on-box so that I could easily remove the setup for AutoX days. I saw a removeable setup at USACi Finals that used massive quick disconnects:
http://www.parts-express.com/pe/show...number=263-112
Drivers would be 7" Dayton RS180, 2" enclosed Dayton RS52, 1" Vifa XT25SC. All carry over from past projects, but should do well in this application.