I've been meaning to upgrade my watch for a while. I have been using a Garmin Forerunner for some time, and whilst the GPS functionality is great, it doesn't provide real time altitude data, and I think the GPS altitude data is pretty inaccurate. So I've upgraded to the Suunto t6d watch (thanks Saira for the birthday gift!)
I get all kinds of data to look at and take my mind off the trail running task at hand. I'll try to add some data to my posts for the nerds out there.