Well, to run air tools properly, all except DA's that is, you need a 3HP belt drive job.
The price of decent one of that spec should decide it for you.
I bought a Clarke impact wrench, not happy on a cheap 1/4" regulator. This was on a 1.5hp direct drive compressor. Rather better on a proper 2hp belt drive 100lt receiver job. But still needs a better regulator. i.e. more flow.