Hi everyone, I am in need of some advice. I do residental pressure washing driveways, houses, pool cages, sidewalks, and so on. I am buying a new machine and cant figure out which one to go with. some people say choose by the cleaning units and others say more GPM is better. I have 3 posible units to choose from. All 3 are 13HP and all 3 have a CAT pump and range around $1600.00. hear they are.

pressure pro 4.0GPM 4000PSI
Pressure pro 4.5GPM 3500 PSI
5.5GPM 2500PSI if i can find one for a good price

The first one has the most cleaning units.. I am stuck. Which pressure washer would some of you guys choose?

Thank you
PowerShine llc