I'm all for higher payouts for exploration data but I feel that making a list of high payout systems is not what exploration is about. I'm not saying you shouldn't do it but you can't truly call it exploration. Can you be proud of an Elite exploration rank (or any rank for that matter) if it was attained by simply following a list of previously discovered systems? Not me personally, and I'm quite proud to have my name on systems all over the galaxy whether those systems consist of just a single star or one that nets me big credits. Why, way back when we had to make do with vanilla FSDs and low wages to be called an Elite explorer but by golly we persevered through it all! We also never had those fangledangled passenger missions to boost our ranks either. Anyway, if you're a player that only sees your credit amount as a measure of success than rank means nothing.
Personally I think explored systems should be explored. You can access their maps and everything. However, give players a better ability to warp around the galaxy as to not have to go 5000 LY just to find unexplored systems. Or just let us hop on a mega ship headed for Colonia or something.