Nilfisk all the way. I have a P150.2. Great machine and not far off serious pro kit. For the money it's fantastic. Comes with the (Deadly) turbo lance - Be careful!
With Nilfisk machines the lower end uses the plasticy type hoses (they have to, the are competing with a lot of low grade rubbish) but on the more expensive machines the hoses are braided and very good quality.
No matter what you buy, always drain the machine properly after use - I fire the gun with the motor running, then fire the gun when the motor is switch off and then my paranoia kicks in and I fire the gun after disconnecting the water hose.
My machine is around 3 years old now. I did have a replacement hose but that may well have been my fault. I didn't connect the coupling properly when I bought the machine and couldn't get it back out. Eventually air got into the supply which caused the machine to pulse. Sent me a new 15m hose without quibbling. I wanted a 10m so they sent one of those and said keep the 15m.
From the above experience, I know that the hose-to-trigger connection has to be absolutely spot on, otherwise the pulsing becomes a problem, so genuine Nilfisk is the way to go IMHO. I tried a replacement hose from a good local pressure washer supplier/repairer and the fittings looked identical, but the air somehow came through the coupling.