The Velo CHTs aren't the best subs. Like the Cadence, it won't go really low, but it should have plenty of output for a large space. The Cadence says 10Hz, but I don't recall it being strong below 20. It isn't the most accurate sub, but for the price it looks and performs well.
I haven't heard the UFW-10 so I can't comment on it, but I know their other products are solid.