Bake,
At those prices you could get into a nice classic double.
If value retainment is what you are looking for, I would steer clear of a new gun.
Sounds like you have time to shop around and learn a bit more about what makes some more desirable than others. Go to some shows and dealers to handle some really good guns - old and new - to see what you prefer.
I don't know how old your kids are, but I feel long term (20-30yrs) the (California) Rigby boxlock will be the dog of the bunch. Better to pony up an extra $10-15K and get into an old Holland Royal.