Top 5 Devin albums?
In no particular order:
Addicted
Ocean Machine
Deconstruction
Accelerated Evolution
Epicloud
If you're including SYL then Alien would kick either Ocean Machine, Accelerated Evolution or Epicloud out.
But honestly, if you're looking for the best starting place it really depends on which part of his sound resonates with you the most.
If you like his poppier, more straightforward side: Addicted or Epicloud
If you want something heavier and crazier: Deconstruction or the Ziltoid albums
If you want something proggier: Ocean Machine, Terria
Aaaand if you want to check out his quieter albums (which you should because they're good), try Ki, Casualties Of Cool or even Ghost.