My former employe bought a crate full of 915s as an alternative to and replacement for their 6906s. I preferred the feel of the 6906 over the 915. The 915 felt too skinny and the grip was like wet glass. It's been a long time since I've seen a 915, but I seem to remember not caring for the sights. I think the 6906 had Novak's night sights. I still have one in my name, but a LEO friend asked to borrow it some years ago and he won't give it back.
For the price you mention the 915 would seem like a good buy, but I'd save up, if necessary, for something different.