My PS3 has SACD support (original 60gb model). BD performance should be identical, the Oppo would beat it hands down for upscaling, but I already have an LG BH200 which has been compared favorably against the Oppo in terms of upscaling (AVS).
I see a lot of people buying the Oppo when they already have a PS3 or other BD player. For my own personal needs I don't think the $500 would be worth it, but can definitely appreciate that Oppo released an amazing product, just not for me.