I will say up front I have no presonal experience with any of these guns, unless by Weatherby you are refering to their O/Us which I've handled a few times. That said I've heard a fair bit about some of the ones you mentioned, so what I say is second/third hand so take it with a grain of salt.

If we are talking SxS:

(1) The Ruger Gold Label is made in the USA and has gotten good reviews in particular for its relation of price to quality (arround $2,000). The difficulty with them is that their release was delayed for quite some time, and that ticked off some people. Also because of the degree of hand work involved in making them they are not hitting the market in large numbers so they are hard to find. They are 12 gauge and single trigger only and have either a straight or pistol grip stock. They do have that Red Label safety which some do not like. They are inspired by a Dickson round action so if you like those you'll probably like the Gold Label. Choke tubes, and 3" chambers too.

(2) As mentioned earlier the old SxS Weatherby imported and sold (Italian) were dropped (problems with quality control I've heard). But they've just lined up a new SxS thats supposed to be quite nice, Italian again (I think). Don't know too much about them though...

Dont' know too much about Kimber...

Hope this helps!