I know you asked for experience with aftermarket sights on that particular gun (which I don't have), but I do have experience with the TruGlo TFO sights on a Glock 17 and they were phenomenal. Fiber optic for day use and Tritium for night. They're a little pricey, but if they have a set that will fit the SR-Series pistols, they're well worth the money. They were exceptional on the Glock I had and I'd put them on any gun I own without hesitation. Unfortunately, they don't make them for the gun I got to replace my Glock so I'm not able to run them anymore.
Give them a try. I don't know if they're available for the SR-Series or not.
I have some experience with Meprolights as well and they're good. I just love the TFOs.