Adding Tub Preamp to HT setup


I'm consider adding a new tube preamp to my HT setup and I'll have my EAD Signature Processor do all the digital decoding. Would adding tube preamp to my HT benefit my 2-chanel listening?

If yes, is there any tube preamp that has HT pass-through?
My current HT setup:
Transport : Audio Research CDT1
Processor : EAD TM Signature
Power : Jeff Rowland 5
Main Spkrs : B&W Matrix 802 S3
supakit
FYI,

My friend uses the balance inputs of his Theta Casablanca from his Classe 401 for hometheater and RCA output on the Classe to his Blue circle pre-amp. The results are very good. Just a flick of the switch on his amp from balanced to RCA and he is done.

Jim
ARC LS-16. Has pass through- worked great in HT/2-channel combo system while I had it. Can find them for around $2k used on Audiogon. Good luck.