This is what I would recommend I bought a Peerless 30 years ago and it hasn't missed a beat. Mine is 12 cfm which is too small for some tools. I found it useless when trying to run HVLP paint gun, As you need a big volume of air to run them.Judging from mine I'd say 12 cfm minimum, I have a peerless P17 (17 cfm) which is the biggest you can run on 240v needs 15amp socket tho unless you do the dodgy earth pin grind down, not recommend!
The only air tool it won't keep up with is non-stop die grinding like after 15-20min straight it'll need a short break to catch up. Great unit no problems in 5 years, aussie made cast pump can be had for around $900 I think these days.