I desperately need to replace my Garmin Edge 510, which is losing settings and buttons are breaking.

There's a refurbished 820 on Amazon for $240, but the reviews are mediocre. I don't want to repeat my 510 experience with a bad touch screen. The 820 also has negative touch screen reviews.

I want a larger screen than my 510 has. But I'll opt for another 500 series to save some money. The 830 is at least $400.

Anyway I'm looking for a worthy replacement.

Steve