You will of course want a Smith smile
This should help http://www.lcsmith.org/faq/buying.html
You will however avoid a several hundred dollar mistake by compelling a doublegun specialist to accompany you on your quest, with chamber length, bore and wall thickness gauges in hand.

P.S. For an upland gun, you could get a well cared for 16g Ithaca Flues and a case of RSTs for $1000 wink

Last edited by Drew Hause; 04/21/11 01:29 PM.