Help with subwoofer decision

Trying to decide on a subwoofer from the following:
Revel SUB 30
Velodyne DD-12/15/18
JMLab Utopia Sub

Current system:
JMLab Mini-Utopia speakers
Pioneer PD-65 CD Player
Conrad Johnson PFR pre-amp
Bryston 3B-ST amp

Room size: 12x19x9

Any input will be appreciated!