chaluga, i saw your build pic in the 'rallying' thread. again, nice work.
as for the mains, if you want to play guinea pig, i might have an idea for you...underdamped, ported, 2512...seos/360
. 2 cubic feet tuned to 55hz gives this:
delta pro12 (tempest driver) and b&c 8" (minion) driver shown for compare...by making the cab a little on the small side for the driver, spl rises a little bit before tuning. in this case, the "bloom" is right in the mid-bass wheelhouse 80-160hz, where sensitivity rises to about 98db 1w1m...not too shab for a 12"!