I went through this a while back while I was assembling my SPF. I did an old Ben Franklin comparison of many of the units out there.
I compared Peak HP, Running HP, Tank size, CFM @ 40 psi, CFM @ 90 psi, CFM @ 135 psi, MAX psi and price as the major factors. I choose a Kobalt K7060HFV, which was/is a 240v unit, from Lowe's which had the highest Running HP, CFM @ 40 psi and CFM @ 90 psi of the 7 units I compared. I was very happy with that unit and used it extensively for doing brake jobs on all the Corvettes at TDE before we had a place to work on them at the Speedway, along with all the work we did on mine and DB's Cobras.
Be happy to send you a copy of the spreadsheet.
