I currently have a RWS model 34 .177 air rifle. I'm thinking of going to a .20 caliber Beeman R9 and was curious if any of you have any experience with either of these guns. The Beeman R9 in .177 is pretty comparable to my RWS as far as velocity and the .20 R9 has a little less velocity but more knockdown power for pest control, etc. Just looking for more opinions on either of these guns if any of you have any knowledge of them.