" If I could have only one gun" (what a nightmare that is) it would be " EEA/Bakail IZH94 Combo Gun.
Made by " European American Armory it features a 3-inch mag. 12-gauge barrel over a rifle barrel avalible in : 222, .223, .308, .30/06 and a variety of " european calibers" . 24 or 26 inch barrels, it weighs about 7.28 lbs. and costs about $499.
(
www.eaacorp.com)
I just saw the write up on this gun in Petersen' s Hunting awhile back and it is the kind of (affordable) combo I have been looking for.
I don' t know which " european cartridges it comes in but there are some that are very similar to the 7mm rem. mag.
Robin.