uhhhh. all i have to say is wow, you are an ambitious person. it has been my experience that bose doesn't like anything but bose. you will always have phasing issues with an acoustimas system being integrated as a secondary system. ie. speakers will work against each other and you will have an odd sounding theater, loud, but odd.
bose acoustics are difficult to match...... with anything on the planet

. my personal suggestion (and this is just preference), is to sell everything and purchase a matching, heart stopping, adrenaline pumping, scare-you-half-to-death 5.1 or 5.2, and in that realm... i would go with the Focal Electra series (leave out the sub and go with a Funk Audio), or Funk Audio 8.2 fronts, 8.1 rears and center, 18.3 powered sub or 2 - 18.0 powered, with a Emotiva xpa5 power plant with a umc1 processor.
so check out funk audio, focal, and emotiva. if you call funk audio, he is wicked helpful with this stuff, and uber smart.
its a big jump, but ive never looked back. good luck dude.
keep in mind that most movies (90% or better) are only recorded in 5.1, so a 7.anything is kind of a waste.