There are receivers at that price point that are THX Select, but in most cases, it should not be used as a deciding factor when looking in this price range because there are few that are at $500.
I was set on getting either a yamaha 5890 or a pioneer 1015 but then I listened the harman kardon's at the local circuit city and the yamaha and pioneer were blown away. Now the one thing that I did not like was the prices of the harman kardons so I bought a refurb off of harman audio and it great. I love it, my old yamaha 5740 does not not hold a candle to the hk avr 330 ($297.00) I now have. I would have liked to get the avr630 but I could not swing the extra cash. I think the avr630 is around $497.00 on the harman audio web site and it will smoke most all of the receivers in that price range.
I was previously set on a Pioneer 1015TX...but after reading the AVS thread on the Panny XR55, I'm definitely going to audition one of these. THe XR70 might be a bit more future proof though, as it is packing an HDMI port.
Since THX should not be the deciding factor then what should I decide on. I have a old Onkyo 838 Req Cinema, which is another version of THX but, I can't find Req anywhere. My present system’s sound just cuts off and on while playing (T. V. or DVD’s) so I'm getting desperate to buy another receiver.