Best way to go HT with focus on 2 channel


I am looking to build my first home theater system, which will have double duty with my 2 channel rig. I really want the focus of quality to be on 2 channel, but want to set up a modest HT rig with 5.1 sound and a plasma. I have a tube pre and amp today and would prefer to keep them in the chain, or move to a tube integrated, maybe a VAC Avatar.

Since I'm new to the HT world, I'm not sure the best way to integrate a AV processor and what exactly I'll need. A little advice from you goners would be a big help. Thanks!
smccull
One of the first big decisions you will have to make is -- do you want to go with a receiver or do you want separates.
I have a Sunfire receiver with Von Schweikerts all around in a HT system. I have tentatively made the decision to go with an integrated amp and use a bypass type set-up just like longhornav. I thought about the sim audio but I thought it was shy on power for the VR-4JRS. I am about to do some auditioning here in a couple of weeks.
I've had the same experience as S23chang. Moving the stereo speakers or even placing a video screen between them to accommodate Home Theater lets the stereo image fall apart. You seem to have some very nice two channel gear. Have you ever had your two channel setup, room, speaker placement, etc. evaluated? Once dialed in even minor changes will dramatically effect the stereo presentation.

I gave up and went an inexpensive HT setup in another room. The 5.1 audio (not HT) is another animal.
Thanks for all the great advice! I was out of town for a while and am thrilled with all the great responses. A couple more questions:

If I were to use one of these configurations, what is the best way to connect a powered sub for use in 2 channel and HT?

If I use an HT pre/processor and go with a separate amp for the rear speakers do I need to match power or gain of my 2 channel amp?