I voted currently top 10.
I think they could be top 5 as they learn to play together. I think they both have the ability to elevate each other's games.
I have loved Fox since his time at Kentucky, and this is by far and a way the best target he has had. Also this is Wemby's first PG that puts real pressure on an offense. CP3 has been great for them, but Fox is a whole different animal compared to 39 year old CP3.
Edit: Also, looking at every duo listed out like that...the league is so talented right now.