I know this has been done to death, probably by me once upon a time, but I can't be arsed to trawl through all the threads.
I want to spend no more that £150 (so any sales you know about then let me know!).
I have two cats who shed lots of fur. I have two small children (6 and 2.5) who are the equivalent of living in a cyclone.
I have wooden floorboards and a rug in the front room, lino in the kitchen and bathroom, two lots of carpeted stairs.
I also have back problems. This is a big of an issue but to be honest not a huge one, as when my back is bad, the lightest of cleaners would be problematic to use. So, really, upright is ok, as long as it glides and maneovers easily. DH would likely do the stairs/take it up and down the stairs and storage is not too much of an issue in that we have no where to put it whatever kind it is! (techincally i should not really be hoovering at all, but that is just not possible).
I would ideally like a miele, but know these are pricey, and there are several varieties, but if we can get one in a sale, bonus! However, am open to suggestions.