Sounds like a really nice system you have. I don't share your enthusiasm for cable but I respect those who do.
Here are some more thoughts based on what you've said. Personally, I don't think you should get the BDP-105. If I were you I would keep your Denon and add an inexpensive BluRay player. Without multi-channel in your system, I just don't think the Oppo is worth it. The Steven Wilson and Porcupine Tree discs are available on DVD and those are 24 bit audio. You can watch the concert on TV with your DVD player and/or rip the 24/48 audio to FLAC and listen to it with your Squeezebox. I have several of these DVDs and enjoy them this way myself.
In 2009 I finally went to BluRay and decided to upgrade my entire home theater. But I didn't want to sacrifice 2-channel pleasure so I decided to split my system in two. I Got an Oppo BDP-83 and Pioneer Elite AVR for the core of a multi-channel home theater and I took my vintage Carver Receiver out of storage and built a dedicated 2-channel system with a Squeezebox Touch in another room. I like the Squeezebox so much I bought a second one for my home theater.
The Pioneer Elite with room correction and Burr Brown based DACs really does well with music and movies, while in the other room I can enjoy vinyl, cassettes (?!?!), silver discs, and music files (and MOG) using the Squeezebox.
With regards to my 2-channel listening (which is what you're interested in), what I have found over the past few years enjoying my systems is that after I ripped all my discs to FLAC, I rarely use my DVD/universal player anymore. It's a very high quality Pioneer Elite DV-79AVi. All my CDs and DVD-A discs (including my concert videos!) are streamed through my Squeezebox now, as well as all of my hybrid SACDs (albeit the 16/44 CD layer). Honestly, I cant tell the difference between the SACD layer and the CD layer of my hybrid discs, so the only time I EVER spin an audio disc these days is when I want to listen to an album I couldnt rip to FLAC - in other words, a non-hybrid SACD. That is a very small percentage of my collection and I often just find it on MOG and don't bother with the disc.
Anyways, I didn't mean to go off on a tangent, I just hope some of my experiences give you some ideas that maybe you haven't considered. Certainly I'm not alone in drifting away from audio discs as I get more and more spoiled by streaming. MOG is a fantastic service and their 320 kbps streams are superb - Indistinguishable from CD's to my ears.Edited by palmfish - 7/5/13 at 2:19pm