I'd start with one of the ProShot, Otis, or Dewey Kits and add in a few items to flesh it out into a well rounded, functional kit.
Stuff like:
Assorted hex and torx wrenches for the fasteners on the rifle
Q-tips
Spare parts (Extractor, extractor spring, gas rings, firing pin, spare bolt, spare batteries, etc....it's dealer's choice)
Lens cleaning cloth
Sight adjustment tool
The above is going to cover 95% of the stuff you'll probably encounter away from the bench. I like pull through cable kits because they'll roll up to be more compact and do a sufficient job of cleaning the barrel for field purposes. Speaking from experience with the Otis cleaning cables, they will punch a piece of stuck brass from the chamber in an emergency when used with the appropriate obstruction remover tip. Add in a small cleaning rod section and it's more efficient.