Call me a tool snob but my tool box full of
Snap On is worth more than my old truck. Yea they are very pricey but since I use them to make a living it's worth it to always reach in and pull out a reliable tool. The other thing is the warranty. No questions asked from screwdriver tips to air tools. They get replaced or repaired on the spot. That way I get to deal with a real tool guy instead of some nitwit at sears.
I do have a bunch of craftsman wrenches and sockets on hand specifically for when I need to cut, bend, grind smaller or otherwise mutilate for a particular application. And when you fix airplanes, you end up making a lot of the tools you need!