CROWN No doubt about it. The smoothest jack around! "all" of the 100 dollar jacks at our terminal are horrible, even the new one they bought. It's like tieing a rope to the skid and dragging it. Come to think of it that would prob be better. :)
I know in Mobile the Caterpiller dealer also carries the Crown line. It may be different where you are. I don't know how much one new would cost, I lucked into the one I have. An accout was going to throw it away because a roll pin had came out of it, and they didn't want to mess with it. I snatched it up, and a quick trip to Home Depot and about .30c and I was in heaven! (I actually got another from the same account with a bad pump, keeping it for future parts.)