For my G26 I started with a all kydex Blade Tech holster
Phantom Series IWB holster :: IWB holsters :: Blade-Tech Industries . I really like and recommend this rig for any model Glock, especially if you are trying on a new size Glock and need a 1st holster. At 30$ they cant be beat. One word of advice, inspect your Blade Tech Phantom before use. Mine was not folded over evenly and in just a matter of hours I had some pretty serious scratches and wear. Very easy to fix if you take the holster apart, heat it and refold it correctly.
My standard ebc rig is a Galco "king tuk" hybrid iwb
Galco holsters; Holsters; Gun holster, pistol holsters, western holsters, shoulder holsters, leather holster and Glock holsters . I love it ! My little G26 just disappears under a t-shirt. I had to use a steel rod and a heat gun to notch up a sight ramp for my tru-glo's. I think most sights would not be a issue but those tru-glo's are so long up front they can and do make a bit of contact when drawing.
I also have a crappy little nylon blackhawk iwb holster, was about 12$, uncle mikes makes a similar one. I carry this in my get home bag incase I have a malfunction with my primary rig, have a belt break (the b.h. nylon is a appendix carry dream) or for long drives sometimes I will switch to this one.
I did try the Blackhawk leather iwb concealment holster, the holster was AMAZING, the belt loop/snap not so much. Dont think I have found a all leather I liked that much, but it moved around to much and the belt loop printed like a mag pouch.
BLACKHAWK! Inside the Pants Leather Concealment - BLACKHAWK!