Which Blue Ray player to buy ?

Sony BDPS5000ES is the newest greatest, with good 2 channel audio

Having owned several Blu ray players, I can confidently recommend the Panasonic brand. I currently own the BD35 and it has been excellent. Panasonic is set to release new models shortly, so I'm not sure what the availability is of current models. Also, Oppo is set to release their player in the near future and it should be very good as well, based solely on reputation.

When buying, you need to consider if you have an ethernet connection available (models with ehternet connection are much easier to update the firmware) and if you need 7.1 analog connections (all will offer HDMI). You also need to know if your receiver/processor is capable of decoding the latest audio codecs (true HD and DTS Master) or if you need the player to do it.

Sony, Denon and Pioneer all make high end players, but its not necessary to spend big dollars to get the excellent picture quality of blu-ray.

Thank you Cruz.
I am going to run it throughi my two channel system. My system ( Mcintosh c2200 preamp , Mcintosh mc352 amp & B&W 804 matrix speakers ) does not have a decoder because I use it primarily for audio. I currently have a Marantz DV9550 universal player that I intend to keep. Therefore, the blue ray player would be used exclusively for films. I have heard good things about Oppo and I know they are getting ready to release their blue ray. Panasonic I don't know.
It sounds like I need the unit to have the built in decoder. Any specific recommendations ?

Wait for the new Oppo player. It will be released soon. See AVS forum for details. Don

The current model Panasonic with internal decoding and 7.1 analog outs is the BD55, but its being replaced with the BD80. The 80 is not out yet and the 55 may be scarce at the moment. The comparable Sony is the BD550. The Oppo may be worth waiting for, but it would be a bit redundant for you since you already have a universal player (the Oppo will plays SACD, DVD-A, etc.). Since you're buying the player solely for Blu-ray, there's a lot of players that would be overkill for you, since almost all available players will provide excellent picture quality with blu-ray discs. The reason I recommend the Panny's is that they have been ahead of the curve in regard to playability of discs, etc. I've yet to encounter a disc the Panasonic would not play. Oh yeah, stay away from Samsung. They make great TV's, but have had issues with their BR players.

Don makes a good suggestion, AVS forum has a wealth of info on bluray players.