They certainly look impressive in the room Martin. I know where you are coming from with the phat bass, I think it's what makes your body move, hence the use in clubs. For me things sound flat without it, not accurate maybe but i prioritise enjoyment over absoloute accuracy.
Haven't thought this through particularly but could you use a 2nd amp to drive the woofers of one of your spare sets of speakers, possibly through the equaliser, as a stereo sub to just give the mid bass boost you'd like. Might be enough to satisfy you till you get your custom builds to fruition.