Hey fellow runners ;D
The new Garmin Forerunner 410 was released a while ago:
Just to let anyone thinking of buying a GPS watch that although this is almost certainly the best on the market, it's pretty much the same as the 405/405CX.
The only differences are a power-off mode, and improved touch bezel, but they've not made anywhere near enough improvements to make it worth buying over the 405/405CX.
So, my recommendation is the 405CX (£160) which is an absolute steal: