I have a Comp-Tac I use for my SP-01. Since they don't make one for the SP-01, I have to use one for the Glock 21. ANYway, they do make them for your firearm, and they are amazing. My pistol is no lightweight, but it offers excellent support and retention. Great stuff and an AWESOME company to do business with!
I have been using a Milt Sparks VM-II for the past 6yrs and find it to be one of the most comfortable holstes that I have ever worn. I like it so much that I have ordered one for each of my carry weapons.