Bob, Gene is definitely right about the value of the Gamo for the money. You generally have to spend a lot more money to get a better gun.
The Webley Exocet XS does look interesting, one again more dinero. My BSA Lightning XL is surprisingly quiet, a combination of the "Moderator" and a powerpalnt that is well designed, close tollerances, synth sring guides.
I nailed a grackle in the Spanish olive tree in my backyard this afternoon from 25yds, dropped it like a stone. The report of the Lightning is a quiet pop, like a BB gun. Once again, this is a $500.00 air rifle.