I had forgotten that I had an old Intel 775 motherboard laying around. I put it in this afternoon and fired it up and sure enough it started. I"m in the process of reinstalling Win 7 and I've done so using my old 8800Gt Video Card. I'm not sure I'll try using the new GTS 450 and might just see if ASUS will take it back.
"You'll find that many of the truths we cling to depend greatly on our own point of view."