Vacuuman

The reason for this is that Dyson, and many other cheaper uprights have brushrolls that are too aggressive on the carpet.  Most of the higher end machines were designed to clean well, but not damage even delicate carpets.   Of course there are some very delicate Oriental rugs that you shouldn't use a brushroll on, but all modern wall to wall carpets can be brushroll vacuumed.

I would suggest Riccar/Simplicity.  These have been approved for all carpet types, and do a very good job cleaning, particularly the Brilliance/Synchrony and the Radiance/Synergy models.

I would highly suggest avoiding the Halo, as they have a lot of reliability issues around the belt driving the brushroll, and the UV bulbs burning out (based on other people's experience), and the fact that no parts are available, and if it needs repair they just send you a new machine.  I tend to prefer a vacuum that you CAN get parts and service at a local store.

I have a central vac too, and also collect them.  I have a few units in my collection, but the one I have installed is a Riccar 2 motor unit, and I have the Riccar tool kit with it.  I personally think central vacs are the only way to go.

The best way to wash the cyclone is to not bother unhinging the filter lid, and instead remove the screws in the top od the cyclone assembly, then remove the top, and the white plate and then wash it.  Works much better.

Speaking from personal experience with Sebo vacuums, i would suggest following your feelings on it and buying it.  I have a much older version of what is now the X4, the 12 inch, where the X5 is the wider 15  inch.  I think it is a very good machine.