Technophiles, rejoice! This past fall the USGA and R&A reinterpreted their rules to allow for the use of laser rangefinders (their legality in tournaments will now be determined by local rule). Traditionalists may bemoan their arrival but should be persuaded by the fact that the instant read these devices provide can really speed up play. We like the compact Nikon LaserCaddy 500G ($299, nikonusa.com) and the Bushnell PinSeeker 1500 with Slope +/- ($644 MSRP/$399 street, bushnell.com). The latter's "slope" feature, which may be used in practice rounds but never in tournament play, provides an adjusted distance based on elevation change (and can easily be turned on and off). Both units are waterproof, simple to use and weigh about half a pound.