Help with advice

[Duckywitbigfeetz]

pretty good with sealed boxes what im trying to do is get more lowend by porting. ( i listen to a lot of rap) deciding between either kicker 12L7 or JL12w7 . here are a few curves.

Tuning ideas:
1) use my rockfordfosgate 3sixty.2 and tune out -28 to -30Hz in an attempt to minimize the group dealy (muddy sound right? or at least big portion)
2) i designed ports for about 20m/s port velocity according to bassbox (to minimize port noise)
3)subs will probably reach for sub 80Hz or sub 100Hz range ( let me konw if this is possible or wishfull thinking)
4) should i got for vent port or round port

here are curves from bassbox: