Best "small" sub for Joseph Audio Rm7 speakers


Just purchased some new Joseph Audio Rm7 speakers and want to add a subwoofer. Intererested in a small sub and this will be used to listen to music only. Heard inconsistent things about Sunfires and don't know about whether a Rel Q series or small M & K would be best. Any suggestions?
rsparkd97c
Do any of these subs have volume remote control capability
or any other great subs for that matter. Im also looking to put a small sub in my system.
Velodyne DD series have remote control volume, night mode (adjustable attenuation when the kiddies are asleep), multiple presets for different types of music/HT, etc.