You can't beat a Central Vac!
When installed properly, and I'll emphasize that properly is the key, they are the best.
Central vacs take all the dust in your home and suck it to a central location then emitting HEPA filtered air away from your primary living environment or vented outside.
The hoses are a smaller diameter from the wall piping. It is important to note that there is designated PVC for central vacs and not household plumbing PVC.
A good install technician is one that owns a vac shop and has been trained properly. General contractors who build homes generally aren't properly skilled at plumbing in a central vac. Piping needs to be done efficiently to minimize twists and turns that restrict airflow.
A good installer puts the sharpest 90 degree elbow turn right at the inlet. By doing so any object that can't make that turn will be stopped there and the whole rest of the way is smooth sailing.
Problems occur when installs are done improperly and consumers suck up bad things: Drywall screws, Bobby Pins, large open paper clips and yes even lingerie..as I've heard stories from technicians.
The best units are MD, otherwise known as Modern Day. Bagged units that are very powerful and a proper dealer can help pick the right one based on your home size. VacUFlo is also a great one.
Some of the worst in the industry are Beam, present model Nutone and even Electrolux. Electrolux over the years has always had great canister and upright machines. However, their central vac with awkward filter design just doesn't have the power that MD and other manufacturers produce.