Help me choose a SUB from the list

[r_n_m]

All,
My present HT setup is as follows:
HK225; 2 paradigm Titans(fronts) and paradigm cc170(center).
I am planning to buy a sub in the $250 range. I have bottomed down to the 3 subs listed below:

JBL PB10 : $200
Velodyne VX 10 : $160(6ave)
PSB SubZero-i : $200

Which one should I go for?? Are there better subs in this range other that the ones listed above??

Thanks for your advice..

--RnM