i bought a RCA from Wal Mart for $150 a couple years back and it sucks ass. my BIL bought a Sony for the same price at Wal Mart and i think it's pretty dang good. i should have stuck to my guns and gone with Sony, but i didn't and paid the price for that.
I have a Samsung 7.1 system I bought at Sams club for like 800.00 and its fucking amazing. When I bought it a year ago it was selling at Fry's for 1400.00 (also includes blu-ray player) im sure it could be had for even less now.