the 305 is on Amazon at the moment with heart monitor for £140. was thinking of getting one and the bike cadence thingy
I paid about the same 2 years ago - I'm pretty sure that its been superseeded by the 405, though I remember quite a few saying that its not as good as the 305 - only thing with it is I do a bit of triathlon and the like and its apparently not very waterproof - but then again this is a fell running site!

I too keep meaning to get the bike cadence things and handlebar mount as I don't find it that comfortable on the bike and also more likely to smash it my wrist.

Good piece of kit though, especialy now I can use proper maps .....