1 quick tip for pressure washers: try to get one with a rubber hose. (you can sometimes buy them seperately if you already have a pressure washer).
A rubber hose is so much more flexible than the hard pvc hoses. Especially when it gets a bit colder. It makes using it around the car and storing the hose again so much easier.
I have a nilfisk E140 (with a hose winding wheel).
Another tip is when you're done, disconnect the water hose, and run the pressure washer (without the lance) for max 30sec, so it pumps out all the water. That way there's no chance that chalk deposits in the pump, which kills the pumpseals. Don't run the pressure washer longer than 30sec without water though.
Also with the water out, frost doesn't get any chance when you store it in a shed for the winter.
Downside for all pressure washers is that fixing them often isn't cost effective, even if you look at parts prices (pump or housing damage etc). Unless you have a professional model obviously. Much more expensive, durable and modular in design.