I like the Fox SW as much as anyone else, but they are getting expensive to find a smallbore ejector (the favored config). For that matter, any vintage American smallbore double of decent quality is getting pricey. I'm thinking of my BSS 20g guns for upgrades. They are reliable as a bowling ball, high quality metal and machining, take modern pressure ammo, etc. The SKB smallbores are similar in terms of these characteristics.
Also, a good used AYA boxlock would make a great upgrade. They are decent quality, compatible with modern ammo, available in about any gauge and frame sizes seem to be scaled.
