Replying to GoPro VS Other POV cams

So long story short...lost my go pro Hero 2 in the bottom of a huge lake this summer. Great camera by the way loved it, easy to use, versatile and pretty tough. Been looking into getting another used one off Ebay or perhaps a Sony Action cam. Supposed to have a quality camera and I can get a newer one with way more accessories for cheaper.

Is it worth the extra $$ for the GoPro? Any other cams out there anyone would recommend?

I picked up my last Hero 2 for $200 in prime condition on Ebay with a helmet, chest, bunch of other mounts. Was a great deal looking for something similar. But considering the action cam as well