I'm in the same situation, and I'm currently using Y adapters in my biamp setup (passive biamping, by the way). I guess I'd get some improvement with an active setup (though I'm a bit worried about altering the internal crossover that was built precisely for these speakers), which would allow me to lose both the Y-adapter degradation and having to send full range signals through each biamped channel. However, I'm biamping primarily to give more juice to my speakers (and at the same time, getting the benefits of biwiring, not true biamping). I'm surprised that more manufacturers don't cater to biamping. I thought it was just my quandry...
