2 channel & h/t question?

I am shopping for a plasma to replace my old sony 32" and am also interested in making an upgrade to a more audiophile sound system to complete the new home theater transformation.
I have narrowed the plasma to one of the new panasonic models...I think they look fantastic!
I also have a very nice 2 channel stereo system in the same room consisting of the following (Odyssey Stratos & Tempest with a Cary cd 303/200 & a vintage Sansui tu 717 along with a pair of lorelei's).

My question is this....can I integrate my two channel set-up into the new home theater package by purchasing surrounds/center/sub & a diff. receiver or second amp/processor? Or would I be better off leaving my two channel alone and building a h/t set-up along side?

If the opinion is to integrate my current system into the h/t...how do I do this?

I would appreciate any help you guys can lend me on this one because I'm lost!!!

Thanks.
Mike.