Budget Receiver Suggestion =]

deciding between these 3 receivers... any advice or further suggestions? My Budget for a receiver is $200. I just purchased the take classic 5.0 and a Polk Audio PSW505. Just need a receiver to deal with these. Thanks!

Onkyo TX-SR309 5.1 Channel Home Theater Receiver
http://slickdeals.net/?sdtid=5565088&sdpid=55215376&sdfid=9&lno=1&trd=http+www+amazon+com+Onkyo+TX+SR+&u2=http%3A%2F%2Fwww.amazon.com%2FOnkyo-TX-SR309-Channel-Theater-Receiver%2Fdp%2FB004O0TRCE%2Fref%3Dsr_1_cc_1%3Fs%3Daps%26amp%3Bie%3DUTF8%26amp%3Bqid%3D1353730598%26amp%3Bsr%3D1-1-catcorr%26amp%3Bkeywords%3DTX-SR309

Yamaha RX-V371BL 5.1-Channel A/V Receiver
http://slickdeals.net/?sdtid=5565088&sdpid=55215376&sdfid=9&lno=2&trd=http+www+amazon+com+gp+product+P&u2=http%3A%2F%2Fwww.amazon.com%2Fgp%2Fproduct%2FB004QQXDVC%2Fref%3Dox_sc_act_title_1%3Fie%3DUTF8%26amp%3Bsmid%3DATVPDKIKX0DER

Sony STRDH520 7.1 Channel 3D AV Receiver (Black)
http://slickdeals.net/?sdtid=5565088&sdpid=55215376&sdfid=9&lno=3&trd=http+www+amazon+com+gp+product+P&u2=http%3A%2F%2Fwww.amazon.com%2Fgp%2Fproduct%2FB004NHCGJO%2Fref%3Dox_sc_act_title_2%3Fie%3DUTF8%26amp%3Bsmid%3DATVPDKIKX0DER

Why the Yamaha over the Sony? Just out of curiousity... I'm pretty much a complete amateur

gotcha thanks