^This^ The Bushnell is a good choice too. It's worth a look for the price. I was gonna mention that as well.Primary Arms... maybe a Bushnell TRS-25 also. It's survived life on my 930-SPX so far.
I have had really good luck with two sightmarks. Dont know why the other guy didnt like them but I am pretty happy with mine. Look and perform as good as my Eotech.
It's already been said like 20 times.... but heres another vote for primary arms.
Other than that, they were great