Good:
Irwin Vise Grips are not bad. They were terrible when Rubbermaid owned Irwin, but since SBD bought Irwin, the product has improved a bit. Still made in China, and not as good as the Petersen Vise Grips, but the price isn't bad. They do have a wide variety of sizes and styles.
Better:
Bremen locking pliers at Harbor Freight really punch above their weight. They are made in Taiwan, and are the best bang for the buck, IMO. Usually cheaper than the Irwins. This is what I would recommend. The adjustment screw can use a 1/4" ratchet for tightening/loosening, which is a nice feature.
Even Better:
Grip-on makes some pretty good ones, but they can be expensive. They are the OEM for a lot of the tool truck brands. Proto seems to be the best deal.
Best:
Malco Eagle Grips are top of the line, but are hard to find, and very expensive. They have also been discontinued, which is adding to the rarity and high price. These are almost too nice, really.