I'd get a 550.
Are you sure the volumes you're wanting to load necessitate a progressive?
You didn't say how many rounds you want to make in an hour but a 650 is more faster'er.
^^^^^what he said^^^^^
I had 10 presses at one point, including a 650 and 1050B...now down to two 550s for hangun and a Redding T7 for rifle....
Unless you are a competitive shooter the 550 will make all the ammo you need...
Bob