I've owned a Scala 500, a 700, and now the 700LX (in addition to a few models of Motorola headsets).  The Scalas absolutely have the best sound clarity, and handle wind noise far better than any Motorola I've used.  I only recently replaced my 500 (battery gave out after a couple years hard usage and it wouldn't hold a charge) with a 700, which I loved--until it made an unscheduled trip through the washing machine.  The 700LX is nearly identical to the 700, with one added improvement.  The earpiece on the 700LX, unlike the base 700, has a much stiffer wire for custom fit.  This way when you get it to fit, it is more likely to fit AFTER you mash it around in your pocket.  Another great feature is turning off the blue blinky LED, so you can be a bit more disreet when calling.  It has a bunch of other features, too many to list but most are useful. I'm surprised this brand isn't more commonly availabe in stores--it works outside in the wind, it has great sound, and is tiny.  What more can you ask for?