I don't know but I would definately go with the M22/Large Sub combination.
I would also check out some other subs such as the ones from
Adire Audio (namely the Rava SE), and if you have a good local hi-fi store, or can make your own killer tuned box (acoustic engineers only
) Eminence.
I personally have an Eminence 15 LF Magnum, arguably one of the best stand alone subwoofer drivers for home-audio use, in a custom tuned enclosure and with a 400W RMS Plate Amp, and I couldn't be happier. It beats out my $1500 Klipsch RSW-15 in terms of clarity, musicallity, and (gasp) LF extension. With the Klipsch only showing a slight edge in terms of raw power (volume), my Eminence, at about half the price, seems like a much better package in the end.
