i have a Ingersoll Rand 2340L5 t30 60 gallon single phase http://www.factorynew.com/detail.aspx?Recnum=AC-300182 . this bad boy never runs out of air.
ive had lots of low end compressors from 10 gallons to 60 gallons an none would ever hold up to painting a car or any kind of continuous use. the low end comps are fucking loud like really really loud. so dont plan on using it at night if u have neighbors.