Joe,
You will find that packages in debian are older than those found in ubuntu.
As you say though, they are better tested and more stable.
I thought ubuntu 7.x was a great distro, changing to 8.x for me things started to fall apart slightly. Still pretty good, but didn't seem as solid.
Also trying to maintain ubuntu on my PPC G4 laptop was getting increasingly difficult, it's no longer officially supported (it's now "community supported" which I take to mean "not supported at all") and various packages on it were f***ed.
Today I replaced ubuntu with debian on my work PC and that's a lot happer too now.
As for drivers (display) I put the latest NVIDIA 173.x drivers on my debian PC and everything went fine. Works like it ought to. (even got the twinview working in 2 clicks which ubuntu failed to do).
On the other hand, linux is still not my main OS for the desktop. I don't run heaps of different apps on it. I use it mainly for occasional programming and software testing, certainly not for anything heavy duty like games.
(Linux as a server though is my only choice

)