RE: One Rifle
Have you considered an Encore with two barrels? Go with a 30-06 for yourself. There is plenty of cheap ammo out there. Get a 223 barrel for the kids to shoot. There is plenty of cheap ammo out there for that. If you shoot 300-400 rounds in the first year you could probably pay for the extra barrel from ammo prices alone. $10 a box for '06, and $4 a box for 223 can go a long way. If I could only have one rifle it would probably be an Encore, or an 1886 Winchester in 45-70.
Watch E-bay, sometimes you can get a pretty good deal on a barrel, and even a scope there. Tom.