He said that he would be shooting mostly from the bench didn't he? If so, a "break open" action is akward, and taking it off your rifle rest to reload disturbs your concentration.
I have a Ruger #1 in 25-06 and love it. However, for the 45-70, I would much prefer a Sharps. Italian copies are OK but if possible spring for an Axtell, Shiloh, or C. Sharps - all made in the USA. If you take one of these to the range you will soon have a circle of admirers around you.