Yeah, the stock strings are usually The infamous red Label strings, the cheapest and worst strings available. If you are playing mostly Pizz,and like low tension, you might like Velvet Animas ($$$)
For something a little less expensive, There are Obligatos, Dominants,Maybe even Flexicores or Helicores, depends on what you want. As far as the bridge goes, unless it is really messed up, instead of replacing it, take to a luthier, have some adjusters put on it, and have it reshaped. The price for the setup work will be less than the cost of a new bridge ( and then maybe you can afford some Animas!

)