Subwoofer to match Vienna Acoustics Bach


I recently purchased a pair of Vienna Bachs. Currently I have a Harman Kardon amp/tuner..I listen to a variety of music, but also use this setup for home theatre. I am wondering what type / model subwoofer would be a good fit with the Bachs to compensate for the low frequency effects needed for many movies (in the $500-1000 price range).

Any ideas would be much appreciated.
kapa311
REL subwoofers work very well with Vienna Acoustics speakers, but I am not sure which one would match best with the Bachs.
There is a dealer in denver who advises REL subs with VA speakers. Once again, not sure which one.Like Nti75, im not sure which sub
You may find a REL Storm III for around $1100 used if you keep looking on this site. Otherwise, there are other RELs that would also work: the Strata and the Q-series, which usually go for less than the Storm III.
I'd add a pair of Vandersteen 2wq's to your short list. Fantastic blend by drawing signal from the speaker level outputs from your amp...but doesnt' draw any power because of input imedance of the sub amp..