Fishcall, It looks like you have some pretty good gear,
IMHO I'd spend alittle more and buy a Sherbourn 7 channel
amp. It's basically what Danielk141 is talking about, the
only real difference is there would no reason too ever
upgrade it. 95% of movies you rent today are 5 channel, the
addition of the two would make the amp future proof.
The Sherbourn products are definately an option you should
consider. I couldn't be happier with my decision to buy one. Good Luck