under $500 used which a/v receiver or processor

i have a integra 7.1 av receiver. yes it does have a bunch of dsp settings and features i think its pretty decent in sound (not really an expert in terms of high end stuff since i havent heard seperates yet) but the power section is not that hefty i think denons and nads (av receivers) have more in terms of power.thanks for the input though

Cruz:

The Onkyo 605 doesn't do the advanced audio formats. Still a good buy however.

There are pre-HDMI Cambridge Audio AV receivers getting blown out in this price range. Try Audio Advisor's site for deals on them.

Rrekstad ;
This is from Onkyo's website :

TX-SR605
7.1-Channel Home Theater Receiver

HDMI V1.3 repeater (2in/1out, 1080p compatible)
HDMI video up-conversion with DCDi technology
Dolby Digital Plus, Dolby TrueHD and DTS-HD decoding
90 w/ch x 7 ch

What audio formats are you refering to ?

any opinions on the marantz sr 4001 in terms of 2 channel music