I've just started on the exploration route - love the change of pace and appreciating what FD have put in the game!
I too am starting to feel my ocd side come out, are advanced discovery scanners worth the price?
Yes, they are worth every penny you need to put in it!
I've been exploring as I find it most relaxing of all. But I only had Basic Disco Scanner with me so I was stuck with looking for moving object with a naked eye.
When I finally bought Advanced Disco, mapping entire systems and deciding if they are worth scanning planets down with detailed scans has become a lot easier and less time-consuming.
One look at the map after scanning a system and you already know these 15 ice planets are not worth the fuss.
On the other hand, one look at the map and you immediately notice 5 high-metal planets and two Earth-like worlds - you know you've hit jackpot!
And, there's one more thing to it. I've recently died while carried away during exploration and decided to fly between asteroids. I've hit one accidentally and I estimate I lost scan data worth around 1M creds. I went back to exploring and heading towards my target (won't tell you which as no one has been there yet and I want to be first!) so Advanced Disco helps me in determining if system I'm in is worth detailed scanning or not. And since I've lost a lot of time, I just save interesting system names in screenshots to return to them on my way back. I wouldn't know that without ADS.
Last, but not least, if you stumble upon a black hole, it may be really difficult to find it if it's far away from your solar entry point. ADS at least locates it for you
Is it worth a buy? You damn bet it is!