Mounting a scope on a Benjamin 397

I bought the 4pc barrel mounts a few weeks ago and put a cheap BSA red dot on it but the dot is so big I cant really aim. So I'm looking for a good pistol scope, my price range is about $60 max. So far I'm thinking about the NcStar SEPB2530B or SPB220B and the Barska 2x20 Contour maybe a BSA if they are really worth the extra cash. I need 10" - 12" Eye Relief and I'll be shooting 30 to 60 yards are so. I also have a question about scope ring height should I buy low or medium, I really want the scope to line up well with my eye. Any help or advice would be much appreciated.



Thanks,
Gabe