I scored an Bag END sealed 2 x12 empty. This cab has 2 sealed chambers and 2 cu ft of internal space. My though is to use someting like the Eminence Kappa or Delta or Delta Light and rear port the cab. I'm looking for reasonablly deep extension and not much on top. If the cab went to 40 I'd be extactic as I'll be pairing it with 1 of my BE 2x10's.. Those guys fall off at 50 but have a screamin' strong mid-range. So my quesation is which driver and port size & depth. Thanks in advance!