[slap bash]

The best is often one with a Image  same parts as a home DIY one, but over priced. Its amazing what these so called companies charge for parts you can buy off the shelf. .

[bobplum]

There is no BEST one. It's what suits you, and what you want to spend.

I have a simple 400L tank, a hosereel, pump, fishing poles and that's it.
Probably cost under £800, and I can clean windows just as fast and just as well as anyone else...