I'm not sure that Ingersoll Rand makes a " quality" compressor in that size. Either a cast iron or aluminum pump would be fine as long as the al. pump has iron sleeves. I have heard/ read that the Quincy compressors are very good units; I don't have any actual experience with them, but I am seriously looking at them to replace my POS Ingersoll Rand compressor that I can no longer get parts to repair. (it is only 15 years old, 100 hours). /forums/images/graemlins/mad.gif /forums/images/graemlins/frown.gif