I know that's a broad spectrum, so I should get a wide array of opinions. I'm looking to upgrade from the Northern Tool unit which I bought for not much money and would have been a good asset in my "Handy Andy" tool set when I was a kid.
Harbor Fright.
Have a MAC tool and it’s held up real good Blue Point makes some good air tools.
Inexpensive MAC tool air chisel = $105.
Husky @ HD = $34.98
Many others available .... under $50
HF.....$14.99