Well I think I've narrowed it down to these two models, the Gamo CFX and the Diana RWS 34 Panther. Wich one and what caliber?

Gamo CFX - http://www.pyramydair.com/p/gamo-cf-x-air-rifle.shtml






DianaRWS 34 Panther - http://www.pyramydair.com/p/rws-34-panther-air-rifle.shtml