Bigman,
Having also now owned both I think I'm in good shape to comment.
The RS6 is amazing at getting you from A to B very quickly in any condition.
It has amazing *grip*.
However it does not have a dynamic edge when it comes to overall handling. It is simple fact, and agreed amongst most car enthusiasts. Too much weight at the nose, too much mechanic grip, too heavy overall, and 4wd. Effective, but not what I'm looking for right now.
As for slow, are you pulling my chain? The M5 is a hairs breadth faster to 100mph but a full 3 seconds faster to 150mph! Maybe yours had the Vanos issue???
Just driven home now, and believe me it ain't slow!
As for dated, I do prefer the overall look and feel of my RS6 inside and out (I have the Avant, I'm not a huge fan of the saloon shape) but I'd hardly call it dated?!
Ultimately, things like this are always personal and subjective, but as of right this minute I have both cars on the drive, and it's the RS I'm selling
