Couple of things,
1) Good "cheap" vise----Ocean State Job Lot, like Frank said. I got mine about 4 years ago. 6" about $40. The screw broke for opening it up. Still clamps great. to open it, I just need to spin the front bar once and then hit it with a hammer. Works great otherwise.
2) It is called a "BALL JOINT PRESS for a reason. It is for pressing ball joints. Always use the correct tool. Personally I prefer the big hammer/small hammer method. Heavy smacks to get it out and little taps to install. Never had a problem.
(well there was this aluminum driveshaft that didn't make it through surgery, but that's a tale for another thread.)
:2cents: