Spend the money on larger amplifiers - you'll get far more satisfaction for the expenditure. I have the same speaker and recommend a minimun of 225 watts (I'm using the VTL 450's). Also have the REL Storm III and have been very dissatisfied with its performance with the CLS.
Martin Logan CLSIIz - adding more bass?
I have Martin Logan CLSIIz speakers, VTL-MB 125 mono block amps (RCA inputs only)and a Sony CDS-X7ESD CDP that is connected directly to my amps. I am thinking about adding a subwoofer and was wondering if anybody has any advice? My room is quite large (open floor plan) with a high slope ceiling in one part-like a loft. I don't know the volume but dimensions are about about 20 x 30ft with the highest part of the ceiling about 18ft. My budget is around $1000-1500USD and I only buy used! Thanks!