Zroland, Sorry I didnt respond to your email directly yesterday, I had a ton to do, the vines needed netting bad!!! That email is at home but I believe you wanted to know a few 2 channel Preamps that have a theatre/cinema bypass.
I have been eyeing the Pass Labs X2.5 for myself. BAT, Audio Research, Rogue, and Cary (SLP2002) are a few of the makers of preamps I know have HT/Cinema Bypass feature.
Retrospectively, since HT is second to me, I wish I had taken this path (dedicated preamp with a preserved two channel signal path). From experience, I earnestly think the mid priced processors perform very close to the high-dollar ones when it comes to HT duties. In other words, you can put less of your budget into the processor, so long as it is handling HT duties only.
You can also do a search on "HT bypass" or "unity gain," and find some other alternatives or at the very least some interesting reading.