We have a Sebo and it is wonderful, we paid about £175.00 and it is worth every penny. We went through two Hoover Vortex's and both had a new motor each, so effectively four hoovers if you follow that logic before we got the Sebo x4.
This review was not written my me, but it may as well have been.
We have had this model for 4yrs now and have had 3 motors replaced (£50 each time) and 2 electrical faults. It always goes after the guarantee period and stinks the house out with burnt motor smell and leave black mark on the carpet. The Engineer said that this was a problem with this model but we still replaced it (cheaper than buying a new vaccum) and the motor has now gone again !. We use it every week for about 25 minutes which I don't think it's excessive. We have decided to cut our loss and buy something else. So be warned ...
Whichever one you decide on - check the Tesco website for prices as they can be considerably cheaper than other places. We bought a bagless (it's great and much better than bags)Electrolux for £74 (incl delivery) which was selling ofr £95 elsewhere.
We had a Dyson and ditched it for a Miele Solution (same as Cat & Dog but with a Hepa filter), it's has made such a diference to DS's asthma that I can't stop myself from telling everybody how much I love it