The Weaver SS will be a step up from the Prostaff for sure. Base-wise perhaps Warne has one you would like. They are very sturdy and reasonably priced. Of course, you could always get a picatinny base and quality rings like TPS, Seekins, etc. For a scope, the new Leupy V6, new Zeiss Conquest Duralyt or a Trijicon Accupoint would be on my short list.