I owned the sunfire signatures and the MK2 and both are not in my system anymore. I have the REL Stentor 2 and will be getting the REL Stentor 3 . I also had the ENTEC SW 10. Rel stumps them all. I have both the Quad ELS 63 USA monitors and Maggies 3.6R Jadis Jp 80 preamp and VTL 450 monoblocks amps. I wish I could afford 2 Stentor 3 subs.