I still have (and use) a couple of the older HD Hero's - not even the HD Hero2. Image quality and overall performance is just fine, for my use. I recently added a Hero4 Silver to the stable, because I wanted to step up to using underwater filters, and pretty much couldn't find anything for the old style housings. To me, that means that if you stick with any kind of Hero3 of Hero4, you'll be good. I'm starting to dig having the LCD screen available. As far as filters, I went with the Backscatter Flip3.1 system.