Thanks postman and cinnamon.
I can't decide between the lime green or the purple. 
I want to use it to record my time, distance and pace. I like to look at a map of where I have been as well. I understand that if I plug it in to the computer it will overlay my route over a google map and I can have friends online with it. Is this right? Oh, and I don't have a computer at the moment, only an iPad. Can I connect it to that?