I don't know much about .40 super other than what I read on the first pages of a google search. I saw 10mm and .44 mag from my FNP and I was in. Seems to be a small investment for a huge amount of gain in performance.

this might be a good thread for you to read hooker... .40 super glock...

http://www.glocktalk.com/forums/showthread.php?t=1094951