I'd add the Shiva-X and Tempest-X, and woofers from Creative Sound Solutions in Canada to your list. They don't get much attention around here because they don't cater to the high school basshead crowd.
The Fi SSD with copper coils will also do admirably with 500W in a sealed environment.
I've heard both the Profis and the Vanadiums and both of them have more than enough output to satisfy someone that's looking for musicality. They're not woofers made for farting, they play music and do it extremely well...