RE: wich 45-70 to buy?????
I've had quite a few .45-70's, my favorite by far are the Marlin 1895's. I've had all three bbl lengths offered (Ok, all four-but the ported bbl 1895 doesn't count in my book and isn't offered any more), the Guide gun, Standard, and Cowboy. My favotires are the Guide gun and the Cowboy, if you're wanting it for hunting, I'd suggest the Guide gun.
I've also got a Stainless Ruger Sporter No. 1, an old Enfield Retrofit, as well as a few Sharps in different configurations, and a H&R Buffalo Classic that I'm rather fond of.
If you're interested in single shots, the Ruger No.1 is hard to beat, and the budget minded historically styled H&R buffalo Classic are outstanding. I'd probably buy the H&R over the Ruger if I were only buying one of them, knowing what I know now, but you don't be disappointed with either. The falling block Ruger is really cool.
You asked which was best for the money, which the H&R Buffalo Classic would win hands down. I'd put the Marlin 1895 Guide Gun next in line, then the No.1.