What I really need is advise on mid bass drivers and components that "fit" with my subs. I know that with my sub stage being 1700 watts the sound is going to be a bit bass heavy either way I'm just trying to balance it out. I've already bought a hifonics 2000.4 to power my components and mid bass drivers. I don't plan on using all of the watts but I want it there in case I change my mind. I want to stay all pioneer as I have a thing for things matching. I already have two sets of ts-1604c but was going to ditch those in favor of ts-d1720c. I was also thinking of using ts-sw841d as mid bass drivers. Basically I was thinking two sets of components and two of the sw841d's. Obviously the amp could support double that but I'm leaving that as a possible future expansion. I do have two questions concerning the sw841d's. First, do they make good bass drivers and second, should they be free air or in an enclosure. Please be sensitive to the fact I'd like to stay all pioneer. However, I welcome non pioneer suggestions so long as you have solid reasoning. Thanks for the help.