My Edge 500 is rapidly falling apart. A critical button fell off today and it's become nearly unusable. So I'm in the market for a new GPS unit, fast. I wanted to skip the 510 and wait for the 520 initially, but the rate at which my 500 is falling apart and the lack of availability of the 520 is tempting me to just spring for the 510 instead.

Would this be a mistake? Is the availability of the 520 imminent?

Another thing to consider; I ride in winter a lot, so I'm not sure if the touch screen on the 510 would be useful at all when I'm wearing long-fingered gloves. Anyone have any experience with that?