power?
since nobody has mentioned it....power ( electricity).
I have an old two piston belt-reduced oil type 5 gal.
has painted two planes, many cars, etc.....and still going, probably 40 years old! I think I put a new belt on it once.
(Yes, it's too small for wings and cars, but you sometimes have to stop at a seam, and pickup again!)
BUT!...when the pressure drops from, say 110 psi to 75 or whatever the set point is, and it tries to come on, it draws a LOT of juice to start up, and throws 15 amp breakers with great regularity...
so, make sure you have adequate power, and perhaps a dedicated circuit for the compressor ( unless you like working in the dark!)
I can listen to the 'dug-a-dug-a-dug-a' sound all day, kind of like a radial engine.
30 seconds of a screamin' diaphragm type oilless and I'm ready to throw it out the door.
The 'quiet' oilless are in a league of their own...lots of airbrush artists and custom painters use them, some look like a gang of Freon compressors hooked to a tank.
Silent. Nice. ( silentaire or Sil-air is one brand...Binks, deVilbis all have a version)