^ You forgot to mention the magnetic, requirement. It's your tools and your call but in most of my toolboxes, I have some rare earth magnets that I can put on any tool to magnetize it as needed... got a 10 pack of the magnets on ebay for about $2, or maybe it was Fasttech.com.
I also have a Magnet-On-A-Stick™ to fish metallic objects out of tight spaces.
Stripped out heads... I just don't see that very often with computer screws because they aren't very high torque, and as mentioned previously, I use high quality screwdrivers. Before I got high quality screwdrivers, I would touch up worn screwdrivers with a file to ensure that the tip had maximum purchase on the screw heads, though eventually that results in them being the next larger, phillips size.
I do have magnetic nut driver bits, acquired 30 years ago when I did HVAC work, but I never use them for computer work, just not worth the bother to get up and walk to the tool box they're in. I can literally do the most common build/upgrade/repair tasks, with just needle nose pliers and a #1 pilliips, or forcepts in a really cramped case, for something like swapping a battery or moving a jumper... which is seldom these days besides the clear CMOS jumper.