I use Wiha for ball tips. Ball tips help when needing to access screws at an angle, but generally strip easier that straight tips due to less surface area contact.
I pretty much use Dynamite for most other metric tools. The Dynamite straight tip hex drivers have tapered tips, and are thus easy to insert into screw heads. Dynamite also makes very good quality reamers (for making holes on canopies), and nut drivers.