Anybody try one of these? I'm looking at the 15x45x50. Also wondering how much I would gain in going with a 20x60x60? What are the advantages with the higher magnification? When I compared them in the store the image just got fuzzier with the higher magnification. Any advice appreciated other than "Buy a Swarovski". Thanks in advance.

Whenever you increase the magnification of an optic, the imperfections of the image get worse even faster. Lots of things influence this, but it boils down to how well it works.
Nowadays, it is possible to get very good performance from some of the cheaper optics. The best advice I can give you is buy from somebody that will take it back for a full refund if you aren't happy.
What are we talking about here, spotting scopes ? E