Any of these will do!
While I have others that blued Security Six above is my 'light' field gun (a SRH .454 is my HEAVY field gun!)
But a good Security SIx, GP-100, 686 S&W will all do. Even the N frames Smiths if you can get one.
But I use the Security Six and I reload 158gr SWC at 1000 fps for most use.