This is right on. I worked for Mac Tools and we often sourced a lot of the brands listed here for customers.I sell tools and I have all the brands that you listed in my box.
You can not go wrong with SK. They were a strong company a few years back but ran into trouble when they tried to get into the air tool business. They have been trying to make a comeback but it has been slow. The issue with them will be getting replacement tools when they break.
Gear Wrench makes a good low to med wrench which it sounds like what you are looking for and can be found everywhere.
As others have said, Milwakee for electric tools.
My suggestion is to look on Craigslist for hand tools. You'll often find a tech in a bad place financially who is liquidating his assets. For new stuff, stick with the brands listed in here. I do suggest looking at Snapon if your budget allows for tools that you will use most often (their ratchets are the shit). IR stuff is perfect for air tools--they actually make them for a lot of the big tool companies. For power, I use both Milwaukee and Dewalt, though for cordless I prefer Milwaukee.