I buy the cheap stuff at Harbor Freight, and take GOOD care of them and they've never let me down. If you read the reviews on any of their tools you'll be sure to find people who call them junk but you can kinda read between the lines and figure out that a lot of them don't have a clue about proper maintenance and care of anything. I have this one here
3 Gallon Air Compressor - 1/3 HP, 100 PSI, Oilless
that I use in the basement part of my machine shop, used pretty much just for an air gun that I use to blow aluminum chips, shaving etc. out of the parts or off the drill presses. I've also used it for powder coating when I only had a couple small parts to do and didn't feel like firing up the bigger air compressor, it's light enough to lug out to the end of the drive to put air in someone's tire. It's oil-less so a bit noisier than the regular oil-filled ones but not bad.
I have the previous model of this one as well that I use in the shop itself, and plan on adding another one like it in tandem here soon, I over-work the heck out of this one with my bead blaster and air tools. I have had to replace the head gasket on mine, but like I said, I abuse them, but take good care of them as well with oil changes twice a year, and got rid of the factory air cleaner and installed a much better one.
Vertical Air Compressor - 2.5 HP, 21 Gallon, 120 Volt, 125 PSI
This one is an oil-filled one, meaning that it has a crankcase like a car engine that has to have oil in it and the level maintained. Mines three years old now, the only problems I ever had with it were minor and easily fixed. I would hate to estimate the number of hours on it, but I use it daily, pretty much 6 days a week or more, so I know it's well into the thousands.