If you plan to use your vibrato, I wouldn't recommend a tune-o-matic, because of the friction (unless you want a roller bridge, but that has rattle problems, sometimes). The usual options are "Mustang" bridges, or a "Mastery" bridge. The Mastery is expensive, doesn't move, has two angled saddles, and a hard, smooth, curved surface for the strings to rub on during vibrato use. It probably gives the solidest feel and the best sustain of possible Jaguar/Jazzmaster/Mustang replacements. Mustang bridges come in two or three "flavors". The Allparts-brand one works, but isn't machined to a fine-enough tolerance for the saddles to touch each other, side-to-side, and so doesn't have the support, resonance, and accoustic coupling properties of an original Fender version (available from their website). The sonic difference is subtle but noticeable. Warmoth makes a "modified" Mustang bridge, based on the Allparts one, but with height-adjustment screws on the second and fifth-string saddles for guitars with a wider fingerboard radius. There is also the "Staytrem" model Mustang-style bridge, which is also expensive, and has stainless-steel saddles, slightly narrower string spacing, and nylon bushings in the feet to keep the overall-height adjustment screws from rattling and lowering. Mustang bridges, like stock Jaguar/Jazzmaster bridges, are designed to rock back and forth with vibrato use. They were meant to be intonated for the guitar in a center-balanced position, but I've found that this is very difficult to maintain while applying a screwdriver to the saddle-adjustment screws, so I set my bridge in a rocked-back position (with a layer of electrical tape at the point of contact with the "thimbles"). I also apply some blue (only blue) Locktite to the height-adjustment screws in the legs to prevent rattling and lowering, and my Fender-supplied Mustang bridge gives me the smoothest vibrato ever, and never goes out of tune.
