I've tried BiAmping, recently actually, and I find that given the cost of an active crossover (absolutely necessary), and a second set of amps, you are better off with one great amp set up and the stock crossover.
Look at Bryston, Innersound (now Sanders Sound), Parasound, Wyred4Sound.
In my opinion the 3.6's really wake up at about 600w into 4ohm, and more is even better. I think you are currently under powered, the headroom angle doesn't wake up the bass in the panels. If you move to a much more powerful amp, you won't believe the sound of a kick drum, or a bass during a jazz passage.
For example, the beginning of the album Kind of Blue, is totally different, to me, from what you have ever heard with extremely well powered Maggies.
Look at Bryston, Innersound (now Sanders Sound), Parasound, Wyred4Sound.
In my opinion the 3.6's really wake up at about 600w into 4ohm, and more is even better. I think you are currently under powered, the headroom angle doesn't wake up the bass in the panels. If you move to a much more powerful amp, you won't believe the sound of a kick drum, or a bass during a jazz passage.
For example, the beginning of the album Kind of Blue, is totally different, to me, from what you have ever heard with extremely well powered Maggies.