My universal player is dying. Upgrade suggestions?

Nope, no blue smoke... all my tubes are fine, it's always the solid state stuff that starts failing. The player refuses to send anything other than stereo signals, the front screen stays black while playing, the player refuses to acknowledge any remotes... crabby fellow, won't cooperate.

Which is better, the Denon 5910 or the NAD M-55?

Yeah, my 2910 is about 4 years old. I never had an issue with it before. I figure the cost of repair warrants an upgrade. I am curious about the Oppo. It gets good reviews and uses Sabre DAC chips. I have an iDecco which uses a Sabre chip & it blows my 2910 away with redbook playback, so I am tempted to replace the Denon with an Oppo at this time... I would like my surround sound to be as smooth and detailed as my two channel playback. I just don't know how to go about it.