bump for the AA.. solid woofers, and there going to sound alot better than the hdc...
the 3 AA have 1w1m of 91, your going to have more linear displacement.. the aq has about 190in^2 the 3 12s will be 220.. aq has about 18mm xmam, AAs 21mm..
aq has 273in^3 of displacement,with 1w1m of 89.8...
AA has 369in^3 of DP with a 1w1m of 90.9...
so with any give power the AAs will be 1DB louder, now after 2500 or so the aqs efficiency will fall off, and the more power you send the AAs the more the AAs will pull away.. seeing your perference i would do 6 cubes tuned to 38.. try to get as much port area as possible with out going under 6.25 after port.. also stuffing the bow with polyfill wouldn't be a bad idea... 4 pounds is enough...