I've been using the Windsor Sensor XP12 & XP15 for 10 years. Great vacuums, see them in almost every hotel and hospital. Nice and quiet with plenty of suck.
A vacuum sales man told me that Sebo is the maker of Windsor vacuum. I know when I look on my XP15, it says made in Germany. Bags are abit pricey as you fill them up quicky. I get 10 bags for $14.99 plus tax.