Other people will say different things, but what matters more at this point is what type of television you will be hooking it up to.
There are tons of DVD players on the market and most support digital audio directly off the disc to your receiver for processing through both toslink (digital optical) and spdif (digital coax). Your receiver has both of these inputs so you should be rock solid on all your audio processing up to any limitations of your receiver.
But, that leaves you the entire video side of the system which is really important.
Also, you will want to consider whether you just want to use the DVD player for movies, or do you want a universal player that can play SACDs and DVD-A discs as well. Unfortunately I don't use my DVD player for audio, so I'm no expert.
But, you may want to consider, if audio is important, being able to run direct 6 analog feeds from your DVD player to the A/V receiver. That will go into the 6 channel direct inputs on the 5760 and provide a separate channel of audio for each speaker directly. Does it sound better than digital? ... well, that's what I don't know.
Video output to your TV can be composite, s-video, component, or more often now you can find some with DVI output. The ones with HD DVI output have gotten some really good reviews for quality as everything is upconverted to 720p or 1080i format before going to your monitor. The connection is digital and should look really good.
Personally though, I went with price and got a Sony DVP-NS725P. Just a regular, run of the mill, progressive scan, component out, digital audio DVD player. About $125 or so and it looks great hooked up to my 50" plasma or 96" projector.