I have a few as well. All of my super blachawks go to Mag-Na-Port for their predator package or time and tune, trigger, new sights, recrown, mag-na-port and maybe barrel shortening. The predator barrel length is 4 and 3/4 ", but I tell them to trim it to 6" or leave it alone. Definately worth the dough.
I have a security six as well. It has a trigger job, time and tune and that's it.
I've had a speed six, superblackhawk long tom that I had Mag-Na-Port convert to a scoped stalker, and a couple of mini's, all sold.
I have four ruger rifles, 2 pre-mkIIs. The first a .300win that I had brown precision rebuild with a shilen barrel, timney trigger, brown fiberglass stock and glass bed. It had a very heavy sporter barrel on it when I bought it and could not live with the weight. Another is a sweet 270 Ultralite that has been rebarrelled (burnt the throat out of the orig), timney trigger, glass bed...my fav. Also, a MkII, UL in 243, just a timney trigger...but...as soon as I find a pre-mkII in decent condition...it's history. And, a #1 in 45.70...as is and perfectly fine.
I think that Rugers are great platform to work with and will continue to purchase them as I can.
Doug