After almost two years since the release of the Forerunner 305, Garmin has finally announced the release of an upgrade in their line of personal fitness computers. A comparison of the two models makes me think that the main difference between the 305 and new 405 is the form factor. The 405 does sport a new, wireless sync capability (using an included USB ANT™ stick), but I never felt that the older USB cradle represented an inconvenience. In fact, the combination of sync and charge in the older USB cradle was really great for traveling. The 405 will require carrying the "stick" and a separate charger. Is that an upgrade?
In all honesty, it is unfair to make an assessment by comparing manufacturer specs -- especially if the products are from the same manufacturer. For whatever reason most manufacturers have an uncanny inability to convey their products' key value propositions. Take, for example, almost any PC laptop maker (e.g., Dell, HP, and Sony). Can you tell the difference between a Dell Vostro™, Latitude™ or Precision™? It's like a exercise in graph theory every time you want to make a purchasing decision. But I digress.
The Garmin Forerunner 405 could be a quantum leap in the Forerunner evolution, as the 305 was to the 205. I won't know until I actually own one and can make a "real world" judgement. The catch is that I'm not compelled to upgrade, yet. Somebody else needs to be the first penguin in the water this time. Unless, that is, Garmin wants to send me an evaluation unit.