Best jack's we have ever used are the old sears blackhawks imho, great jacks but nobody makes them that good anymore (and ill just about bet we've jacked more cars casually than any other individual, dang we need an indoor shop and a lift lol)
As for new ones, i like the hein warners. Same things as snapons, or used to be. Blue with yellow accents, 23" fully extended, 3 ton (we have some 2 tons too but dont lift nearly as high, like 20"). Nice, big square on the end of the jack (not the small and rounds like the cheapo's).
Get them for right around 300 last time we bought any. I love them and dont even think twice about the sear's pos's. We had one for a day and took it back, and didnt even jack anything up with it. This is when dads best blackhawk started acting up and before we learned about the hein warners.