I am in the market for a cold water electric pressure washer. I will be using it to clean sidewalks, driveway, brick house and siding. I have spent hours reading reviews and from what I read I narrowed down the field to 3 models. The karcher X series 2000 psi and the AR blue clean 1900 psi 390/ or 1800 383. Does any one here have any opinions on these, or another model they like? Thank you in advance.