Welcome to the forum. You asked the question all of wish we had asked before we purchased one. There has been plenty of the same question on all forums. The only advice I would give is, In My Opinion, purchase one that gives you more air than you think you might need in the future. Sometimes noise is a factor, so unless you have large budget, you may have to settle for something less. Get the best you can afford.
Jan
My only advice is do NOT get the paasche dl 500 compressor you need a tank to hold air. I am not happy with it and find it pulsing when I am trying to do lines.
As Jan and Hairy already mentioned, get the biggest and baddest compressor you can afford.
And make sure it has a tank attached to it. You'll need all the spare air you can get.