I'm not sure why but I've always wanted a double rifle. The only problem is that you don't see too many in the States where we've embraced the bolt, lever, pump and auto for hunting. The other reason is that they are often very expensive due to the amount of work that goes into a high quality one.
A few months ago I as able to handle an EAA Baikal Double Rifle in 30-06 SPRG that brought back my desire for one. Baikal chambers this particular rifle in 308 Winchester, 30-06 SPRG and 45-70 GOVT. Incidentally, if you asked me to make a list of my three favorite cartridges; those would be them.
Here are a couple videos from Mike Beliveau featuring the 30-06 and 45-70. Mike explains how Baikal is able to price a double rifle at hundreds of dollars instead of thousands.