JL subs and Maggies blend just fine. I've heard a totally seamless setup. A pair of Mag 3.7s and JL F112's would be within budget and give you everything, including linear tight bass down into the 20's. Having JL subs gives a big boost to perceived dyamics of the Maggies. JLs come with a microphone and setup/integration program.
Another thought: if you can find some Eggleston Andra II's in your price range, I think they'd give you absolutely everything you're looking for.
Another thought: if you can find some Eggleston Andra II's in your price range, I think they'd give you absolutely everything you're looking for.