oil-less compressors

i have just noticed that oil-less compressors are the ones which dont have a tank. the guy at my LHS said they are extremely noisy. and recommended that i get the ones with tanks.

however, the ones with tanks arent oil-less compressors? he said that whether it be oiled or oil-less, it doesnt matter?

replies would be nice =P

Got this info from this website that sells airbrushes and compressors if it helps.

http://airbrushes.com/index.php?osCsid=b11223eb009a492644f50ba08174a03c

Diaphragm Compressor - A pulsating membrane compresses the air. Diaphragm compressors are fairly noisy and cannot be run for extended periods of time, so they more suitable for hobby applications than professional use. We recommend attaching a moisture filter to remove condensation from the air supply and to even out the pulsing.

Piston Compressor - A piston or pair of pistons compress the air. Piston machines are generally silent or very quiet running and therefore exeptionally well suited to applications where noise would interfere with the creative process or make the working environment less than ideal, such as in a beauty salon.

Oil-less Compressors - Piston compressors can be either of the oil-filled or oil-less type. Oil-filled compressors are usually more silent, but oil-less compressors like the Iwata Studio Series are still quiet running. The main advantage of oil-less compressors is that you do not have to change any oil, making them low maintenance, and there is no risk of spilling oil when your compressor is in transit if you are mobile.