Keep in mind though...
I looked at the Clarke model before, along with another Italian model (the brand escapes me)and the Karcher. I talked to someone who had tried some of these professionally (the Clarke was the latest one he'd used. The thing about these machines is that they tend to break down a lot, and be expensive to fix. The imported ones can be so expensive they'll never be worth the parts to get them going. And all of these seem to be fairly unreliable. So be wary before you get out your checkbook.
If you get a Hoover Floormate, or similar, and it lasts a year or two and then quits on you and you have to go buy another one, you'll still be money ahead towards other equally desirable things. If you invest the kind of money these things can go for, and end up with a repair bill that costs more than buying a new elcheapo, you may have a machine sitting around not working because you know you're wasting money fixing it...again.
Also, the guy I spoke with actually recommended the Floormate to me, because he had to get one to finish a job the Clarke broke down on, and said it left the floors dryer than most of the other brands.
Just a counterpoint to consider. Personally, I've always thought the Karcher upright floor washer looked like a cool machine, but I've never been able to justify the price.
Also, keep the Duplex CRB type machines in mind. They use a different technology (no vacuum) but they have a better reputation for reliability and can clean other surfaces (like carpets)so there are more of them in the wild, and the parts and such are more readily available (cheaper). I know PowrFlite sells one model.
Good luck whichever route you go, and make a video or something if you can so we can all see how they work.
