I need u to help my father pick one....

[sumik]

So we got big sales going on here in Canada now and I finally convinced my father to get new home theater. The problem is we'r not sure which BD playyer to get to match his new speakers and receiver.
He's getting :
Denon AVR-4308CI Receiver http://www.usa.denon.com/ProductDetails/3494.asp
Tannoy Arena Highline 500 Speakers http://www.tannoy-speakers.com/s.php?product=207
And he has Panasonic 58 Plasma he bought a year ago.

Now here comes the problem. Sony 350 or 550 ? or Panasonic 35 or 55 ? Or we can get Denon DVD-1800BD for around $400 (in canada it's cheap).

I'm sorry for such a wide range post but we'r clueless. Could someone post pros and cons and what u would suggest ? Money isn't really an issue, it's only around $100-200 difference between all the players.

Edit: Nevermind on Denon Player, it's 1.1 profile.