Ryan,
Pick out your air tools first. Look at the consumption rating of the highest one and make sure your compressor choice will handle it. It is a real pain to have your tool slow down and you have to wait for the air compressor to build up pressure again.
My orbital sander uses almost as much air as my glass bead blasting unit, a real "air hog". The other tools don't use anywhere near as much, but may be a factor with smaller compressors. I had to size my compressor to handle the bead blasting, so everything else I have does not make the air compressor breath hard.
Check out your tools first and then pick an air compressor that can EASILY handle the draw.