Well, I guess the first thing to say is the .45-70 isn't an expense.......it's an investment. My 22 inch shoots the pants off everything I own, and is still worth more than I paid for it. GET THE .45-70
There's lots of posts on it here, and you can load it from chipmunks to brown bear. A friend of mine in Florida scored on a Wesson and Harrington .45-70. I know he "stole" it, but I don't think he's shot it much to give you any information.
Pete.