Best vacuums I've used are:
- TriStar 2-speed CXL
- Filter Queen K31X
- Kirby Classic
- Sanitaire SC888
- Ridgid WD1670
and the worst I've used or tried out:
- Bissell Healthy Home
- Hoover Windtunnel 2 (bagless with self cleaning filter)
- Dyson DC07
- Eureka Optima
- Aerus/Lux Guardian