GPS Options–Birthday Ideas

I always get asked what I want for my birthday and can never think of anything that I could actually use that is a fair price.. I was thinking about throwing a GPS on my list. I would like one that is fairly easy to use and read, but can also be mounted onto my handlebars and take a little beating. Prefer waterproof incase I get caught in the rain.
What have you guys had and what are the PROS and CONS?

Thank You