Aha you guys are killing me man - I don't want to blow wads of cash. I like the look of 5 of those tang band speakers.you can go fullrange with 5 tang band W3-871s, two of them in these enclosures http://www.diyaudio.com/forums/showthread.php?s=&threadid=47403 for your fronts. This is what I was going to go with, and probably will eventually. You will still need a sub obviously...
Those are just a few choices....thats my contribution for DIYers....
Edit: Of course as Jim pointed out, theres no point in going full HD if your sound stage is going to lack...
A mach 5 driver.. thats a sub im guessing? Also what's the deal with plate amps?$400 isn't too bad for a sub, amp, and enclosure.
You could always get a Mach 5 driver, cheapo plate amp, and build the enclosure yourself. That is still going to cost you about $250 though.
Check ebay and audiogon, I see pretty good deals on both.