Pairing surround processor with tube power amp

Does anybody here has experience pairing surround sound processor, such as Krell or McIntosh with tube power amps? I am currently using CJ Premier 12 monoblocks with JM Lab speakers. In stead of connect a HT multichannel amp bypassing the stereo pre-amp, I am wondering what will happen if I just use the surround processor?

Thank you!
I paired a theta casa nova with cary slam 100 monoblocks and manley 440/200 monoblocks driving soundlab m2's; very nice without problems.
The theta performed very well even just using it for 2 channel stereo;I think you can find several processors that will play very nicely in stereo and also perform its duty as a processor.
I have the Premier 12’s and use them in a combination 2ch/HT system. I also have a CJ CT 6 and Lexicon MC4 processor. I’ve tried doing exactly what you are talking about with the hope that I could simplify things a bit and eliminate the CT6. In my case I was not happy with a processor for 2ch duties. The only way you'll know is to try it, but if you’re currently using a tube preamp, I doubt you’ll be satisfied with a processor.
I have tried what you are talking about with a Meridian 568 connect to a Vac PA 90 without using a two channel preamp. I my case I liked the preamp (Calypso) inserted into the chain. Each has his own preferences.