I am not a big fan of Wagon Train because there is often far too much talking and little action.However the 2 Roberts- Horton/Fuller are great.A good western series on Amazon prime is
'The Californians' .It is fun and is in HD.Lasted 2 seasons.My 2 favs on Starz are Laramie and Tales of Wells...
Actually all episodes of the Virginian are available on Starz westerns,For some reason its listed as season 1 but there are a total of 225 plus Men of Shiloh- 24 eps. Clark