Ruger used to make two sizes of frames for their centerfire single actions. The 357 was on a "colt-size" frame, and all the others - 41, 44, 45 and (for some strange reason) 30 carbine - were on the "super blackhawk 44 magnum" frame.
Along came 1973 and the New Model, and the "colt-size" frame disappeared. Now the 357 was also built on the 44 frame.
Then came the "New Blackhawk" (that's what feralmerril's picture is), and it is, again, on the "colt-size" frame.
If you get a "New Blackhawk" in 45 Colt, and attempt to shoot "Ruger-only" loads in it, you will damage your gun. "Ruger-only" loads are only safe in the regular New Model Blackhawk and the standard Vaquero, both of which are (were? do they still make this gun?) on the 44 magnum frame.
Super Blackhawks have a nicer hammer. The shape is different from a standard hammer - it is lower and wider - and it is much easier to reach. Like a Smith Target hammer compared to a Service hammer. The Super has a wider trigger, also. And the Super's grip is larger, which may or may not be good for you. I've been told by others that the square-back trigger guard hits you when you shoot, but mine never has.
http://www****ger.com/products/newMod...mages/0505.jpg
http://www.larrywillis.com/blackhawk.jpg
So, in my opinion, if you want the ability to shoot "super magnum loads", you should get the Super.
But if I was just going to go buy a new Ruger, I'd get a Bisley Blackhawk in 45 Colt. It's got a better hammer shape, a better trigger shape, and a MUCH better grip shape for heavy recoil. And while mine will take "Ruger-only" loads, I see no reason to shoot 'em in them.
