Talon Roc subs - worth it?

I'm looking for a pair of nice (powered) subs to fill in the bottom end of my ML ReQuests. I have heard the Talon Roc is quite fast, leading me to believe it may be more suitable for my system than other some of the other subs on the market. Howerver, the dichotomous reviews of the Khorus (here and at Audio Asylum) have left me uncertain as to whether the Roc is worth its price. How good is the Roc? How does the Roc compare to other subs in the $3-4k range that you have spent time with? What about the quality of the Roc's driver, amp/electronics, and overall construction? Do any of you have experience using the Roc with electrostatics? I will be grateful for any advice from those who have owned or seriously auditioned the Roc (and who are not affiliated with Talon or one of its competitors). Thanks, Don