I'm putting together a high end home theatre system and am confused by the choice of subwoofers. I am prepared to spend £800-£2000 if the performance warrants it. I've shortlisted the M&K MX-350THX. Any experience with it? I understand that M&K are used by THX, Dolby and DTS, as well as loads of studios. Is this correct? Surely if its good enough for them ,its good enough for me. Has anyone got one or knows of a better one?