A very important thing to think about if you are going to purchase a compressor is, now that you have it, you be running other air tools! Paint guns, air sanders and impact tools all use different CFM to properly run. Determine which tool uses the most CFM and then purchase a compressor that exceeds that CFM to allow the compressor to catch up and have some time to cool down between cycles. The max CFM should be rated at 90 PSI or greater to get the best performance and life from the tools to be used.