I haven't looked into the T-30 since I got my current compressor and have looked into them since you posted this and wow they have changed since I looked at getting one. They have cheapened up something nasty. They were a good heavy duty unit back when I looked at either the T-30 or the Champion and chose the Champion. That pump needs to spin no less then 1575 rpm to get the CFM'S claimed, that is flying, I watched a youtube video of it at 1st start up and man that thing is crazy fast. The biggest down fall to a pump zipping along that fast is heat and oil in the air supply. The slower you can turn the pump the better off you would be.
So what can someone take away from this? Look for a slowest pump that will give you the CFM you need, more is better with a tank size that will hold a decent amount of reserve, no less then 80gal IMO.
Remember when it comes to this type of equipment, buy once, cry once.