Without looking at the specifics or all of that kind of stuff, I'll just say one thing.

I can't ever bring myself to buy a "last years verison" type of a car. There is a new S4 rolling around, so say you go and spend 20k on that older version because it's a "good deal", bottom line is you still have an old and inferior car compared to the new one.

I know, that's lame...

Now, more what you want to hear - I love S4's, any and all. =]