I have basically the same setup. Acurus 200x3 powering the front stage and the Outlaw 7140 powering pretty much everything else. Since that left me 1 channel short of 11, I added a HK 2000 which powers one of the height channels. Not exactly ideal but it seems to work.
If you're thinking about external amps then why buy an integrated receiver? I've personally never understood the logic for this, especially if you have a larger room. For about the same money you could buy a nice Pre/Pro and get much better performance. Remember, that 110WPC is measured with...