Oil Lubed compressors are so much quieter it's not funny. I gave away my oilless 24 gallon compressor because I just couldn't stand the noise. My 60 gallon Home Depot special takes oil and sits on the garage floor with 2" rubber blocks under the feet. I added 18" of coiled 1.5" rubber hose to the intake nozzle, and it runs quieter than the dishwasher in my kitchen. Quiet is nice.
For portability and quiet, I have a 8 gallon oiled compressor from Home Depot. That's what I'd recommend for the Shoebox.