I run an older version of the Paradigm Reference (Studio 60v2, CCv2, and a pair of ADPv2 rear surrounds along with some Axiom M3 side surrounds due to room constraints) along with an Outlaw LFM-1 sub in a room larger than yours (23'x17'x8'). The 990/7500 combo along with the Paradigms would be an excellent fit. If you have some room behind the seating position, you could go with 7.1 (as you mention considering with the Axiom setup) using a 7700 amp. Having used both Paradigms and Axioms, I would lean toward the Paradigms, but that's based in part on a comparison of surrounds (the Studio ADPv2's were somewhat better surrounds to my ear than the M3ti's) and both companies make mighty nice speakers. If you haven't done so already, I'd strongly recommend spending some time demo-ing the Paradigms using your own source material (CD's and DVD's that you are familiar with, focusing mainly on music) and if possible find a way to demo the Axioms if you can. Axiom does offer a 30-day return policy like Outlaw, so you could even demo them at home - you could even try just the M22's and order the rest of the setup if you like them.