Oh, by the way - I will be another to recommend the Sebo X4, I sold mine to my old Primary School & they can't get enough of it, they absolutely love it! So here's another YES to the Sebo. I wasn't that keen on it myself though, even though it managed to get Ground Coffee out of a Deep Pile Cream rug, which nothing else could do.
For Steve & Alex, your responses have been really helpful. It's been nice talking to others about, you know... 
Thanks again.