So I was thinking of looking at a two way tube(Marchand?)active crossover in addition to adding an active sub to the system. It would look like >> CD player then Foreplay then Paramours then active crossover then 4 Pi's with one out of the active X-over going to the active sub.

Is this be the correct order? or is it active-x-over then amps then speaker & sub? I would still use the passive theater 4 pi crossover? No? Yes? Any suggestions for an active sub that would blend well with the above system? Parts Express DIY? And FINALLY the last question, does an active crossover increase the depth of image (or 3 D soundscape if you will)?

I have to say that I could easily live with the way the system is right now with no changes, but half of the fun for me is seeing what tweaks I can do to change this and that & see what happens as a result. These speakers are truely awesome.

Thanks all!!