Over the years I have had a few different compressors. Best I have had is California Air Tools one, they make a line that is a lot quieter than the typical construction site portable ones, which lets me run it without ear plugs. Runs ally engines no problem. Its the two gallon one.
More recently I lucked into a used JunAir unit, 10 gallon, super quiet but new ones are super pricey too. Very heavy, but no louder than a refrigerator.