This is how my system is now. The TV is obviously just giving me something to watch until I buy a plasma and a video processor. What suggestions do you have for the rest of the system?
I second Vader007's PC suggestions. I have the 12b and the VD NITE PCs really did the trick. Smoother less "digitized" sound. Try it straight into the wall. You might not need the PS Audio stuff.
The Lex 12 series I bet does 2 channel just fine, as it has analoge pass thru...tube pre will be a different animal all together and maybe you will like it better, but that $10K pre/pro is certainly NOT your weak spot. Work on power/ICs.
I know what I would do......get yourself a tube preamp and parity gain your HT through it. Now when you desire good two-channell you'll have it. Not that Lexicon 2 channel sound. Don't get me wrong, your Lex is fine for HT, but one good tube two-channel pre would shake your world....try it and see. You are close to having the best of both worlds! Don't forget the suggestions of the others in the thread as well.
Sugarbrie has you on the right track, those were my thoughts exactly. Have you any power conditioning? A PS Audio 600 would make a fine addition to your system. Dont forget a couple quality power cords as well. Good luck.......Vader