The Rythmik subs are gaining a reputation as working well with Maggies. A couple of guys with MG-IIIA's have expressed their satisfaction with the F12 and F15 models on the company's forum at AVS. I use the Rythmik/GR Research OB/Dipole Sub with my Eminent Technology LFT-8b's and Quads, but they're not for everyone. Read about that sub on the GR Research website---it's very special, and especially good with planar speakers.