If your AVR is able to decode DSD sent over hdmi, any hdmi capable sacd player should do. Check the manual.
Most Sony DVD and BD players support sacd, even the super cheap ones. Also check out the Pioneer DV-610AV. It's $100-120, plays sacd and DVD-audio, and has controls on the front panel so it's possible to navigate without the remote if you just want to play music without messing with the remote or tv screen. Downside is that doesn't play blu ray, but if you can spare the extra hdmi port, you can get the Pio and a good BD player for significantly less than the cost of the Oppo. Dont get me wrong, the Oppo is awesome, but $500 is a steep cost of entry, considering how good bluray and DVD playback is from a much less expensive Sony or panasonic bd player.