Sounds like I need to get the GTI with the Brax/Helix system back up to the office in Calgary!
The ML10 is a fantastic woofer. It easily matches any subwoofer I have ever heard in transient response. Low bass extension is great as well, and in the GTI it blends perfectly with the Brax speakers. I have yet to hear anything unnatural sounding come from it. It plays with real authority as well, although I tend to like the extra output of a vented enclosure.
If you are even thinking about it you already know it is a step beyond most other woofers.