Hi Jeff,
Boy, since you admit to owning a model 70 Win in 30-06, I don't know why you needed the .308 barrel?
?? But since you have it, you might consider thinking about using the .308 for range use as there are lots of .308 commercially loaded fodder and also mil-surplus stuff available to punch paper .
What you need for future growth is to begin reloading and then you can grab whatever strikes your fancy as you head out to the woods. You now have four all in .30 caliber that will take deer quite well no matter what! I believe you will stick with the two model 94's for the woods.
As for expenses, staying with 30 caliber saves you buying allot of different reloading supplies if you go that way. If sometime in the future you decide on other choices for the Handi Rifle might be something like a .223 for popping a woodchuck or coyotte. The round is cheap and easy to buy just about anywhere you go. Just my ramblings!
Jim