If you don't mind spending a little more, I just picked up an Oregon 450t for my work and it's a really nice little touch screen unit. Size is great for on the bike. The newer version of the Dakota I believe. Even has a nice bike function that you can use instead of your computer. It has an altimeter, and some way to hook up a heart rate monitor and cadence if your into that sort of thing. Only fault I have with it is that you have to buy the street navigation maps seperate. It has pretty good topos, hill shade, and all that other fancy stuff and shows the streets and POI's but if you try and navigate with out the street maps it just puts a straight line to where you want to go.