I can't tell from your post whether you intend to use the preamp strictly for HT, or whether you also want a preamp that provides high quality music reproduction. If you are looking for a preamp/processor that offers both analog and digital circuitry, check out the Bryston SP-1. (BTW, Bryston builds Lexicon.) The SP-1 lacks most of the bells and whistles, and is also minus a tuner, phono preamp stage, and video switching, but it's a fine analog/digital preamp that also has excellent surround processing. Bryston designed the SP-1 primarily for audiophiles, and you fit that target market, then check it out. I have been very pleased with the SP-1 I own.
