All around best video card?
Probably ATi I'd say. They produce a well rounded card that does "well" in all areas. It isnt always the best but it's not really bad in any areas either. Driver quality does make their position as holding the best "all around card" a very debateable point however.
Of course the best "all around card" isnt necessarily the best for everyone as another brand may stand out in the areas that are most important to them, and lack in areas of lesser importance.
What would be best for me would probably be one of the nVidia boards with semi-decent 2D. Still not up to ATi calibar IMHO, but good enough to satisfy me.
But then, what's best for someone else may differ drastically depending upon their requirements.
nVidia has drivers and 3D performance going for them. They have 2D quality going against them, and limited options in the way of Dual-Head cards, and a poorer implementation.
ATi has feature set, and DVD going for them. They have driver quality going against them.
Matrox, has the best dual head implementation, and the best 2D going for them. The have 3D performance going against them.
PowerVR... well they don't truly have the "best" of anything, but neither do they have the "worst" of anything either.