Think you'll love the new system. But, no reason to dump home theatre except for cosmetic and space considerations in my book. The home theatre part of a system does not have to be and "end game" system. Add an inexpensive HT processor like a Sony or Technics (100 to 200 used), a Gallo Due for the center and a pair of Micros for the rear. Use your two channel speakers for the F/R speakers. I've done this a couple of times with my all tubed system and it works out just fine for movies and TV with dolby digital.
I just plug the home theatre stuff in when I want to use it; for serious stereo listening it simply gets unplugged.