If it were me I would stick with the 755 and the 5005 amps before I would spend $$$ on another amp. You have 12 cjannela of high quality amp so why not use it for awhile. That option gives the best bang for the buck right now and probably well into the future.
Xenonman, I'm not sure what I was thinking but you are correct. I'm not sure what's got into me..