In terms of linear output capability, not one of the woofers mentioned is going to beat the W7.
The H2, Brahma, and XXX are the only ones that really match it for absolute accuracy as well.
The CSX is a joke compared to any of those woofers for daily purposes, as it is by far the least ideal for musical purposes, and the most overpriced of the bunch as well. Don't bother with Treo at all for musical purposes, their woofers are nothing special for that purpose.
Honestly, why not just get a bigger amplifier and use a bigger box? Honestly, you're nowhere near the full capabilities of the subwoofer with that amp.