Dc23
I will throw my hat in and say the DC23 turbinehead canister.
OK, it's the only Dyson I've owned, but it works very well for me. Carpet cleaning performance is great. The filtration is excellent! We're moving into a house that's primarily hardwood in the next year, so I'm excited it will be in its element. Just bought a Flatout hard floor attachment for that time.
I like it a lot. Seems to have a lot of suction!
What's the failure mechanism of the turbinehead, by the way? It was mentioned that the brushes over rev if engaged but not used on carpet.
It's too bad the hose isn't engineered to be longer. Dusting high places is very impractical.