I have a Storm III sub, which I auditioned against several other ST series subs, including Stadium and Strata. The tough part was the speakers it had to 'mesh' with - Martin Logans. Electrostatics are very fast, and subs tend to have a hard time working well with them. I just kept coming back to the Storm as my favorite. It literally disappeared as a separate sound source. It also had excellent depth and smoothness on top of it's speed.
Of course YMMV, as you have very different speakers to work with. The bestest recommendation is to hear them each setup with your speakers in the SAME environment and physical orientation so you get a real comparison.
Of course YMMV, as you have very different speakers to work with. The bestest recommendation is to hear them each setup with your speakers in the SAME environment and physical orientation so you get a real comparison.