Digital Source; what would you do?

Hello all, I've been lurking these boards for some time now hoping to improve my audio system from the vast expierience of Audiogon posters. I currently have paradigm s4's amp'd by a bryston 2b sst crossed over at 60-80 hz (depending on material) to a martin logan descent running off a denon 3805 in a surround setup. My main source right now is my computer using a chaintek av710's digital output at 44.1 to the DAC's in my denon receiver.I am under the belief I need to bypass the denon to clean up the sound as I have heard the denon can exibit a hard treble coupled with the metal dome tweeters in my paradigms. And I'm sure most of you know how fatiguiing that could be. Don't get me wrong though I'm not (yet) looking to give up on the paradigms so no bashing my tweets please :) as I find certain discs to sound quite good (Norah Jones, Jack Johnson, Accoustic Alice in Chains, anything accoustical sounds good really. I do like to let it rock a bit though and find listening to Tool it can get a bit edgy quick. As far as my temporary Room accoustics go my apartment living room is far from Ideal with glass patio doors along one side, french den doors in the rear and open to the kitchen and hallway on the left side. I can live with the current HT performace, as my system does nothing terribly objectionable in this regard. I use my computer to upconvert ripped archived DVD's and plan to keep doing that until I get a sony blu-ray player that I am hoping can serve as a sacd/cd player or CD transport. Ok I think I've laid enough back ground on my humble setup and would appreciate any opinions on improving 2 channel performance. I currently like the idea of going with a bryston b100 sst DAC using the HT pass thru and possibly trying bi-amping or selling my 2b. Anyone know if you can bridge the amp section of a B100? My other options of course would be a stand alone DAC, usb or otherwise as well as just a dedicated cd player. Hopefully somone has gone through a similar situation with good results. any opinions would be be greatly appreciated. thanks, Dan