I got tired of trying to find a cheap unit and went with the camspray 1500a. That unit rocks.
I know I might be crazy, but I think that a lot of the cheapies are overrated. That being said, PSI is only half of the equation. The other half is flow. A 1500 PSI with 2 GPM will clean better than a 2000 PSI unit at 1.2 GPM. Multiply the flow X pressure and that gives you cleaning units. Pressure is nothing if you can't wash the debris away.