you really can't base how well a car is selling by what you see on the road in your area. the cheese country gets fair bit of snow, so they would prefer awd capabilities of the audi. since i live in the mo town, i see quite a bit of american cars, and lots and lots of SUVs and minivans, but i'm sure that's not the case everywhere else.
anyway, i hate the gaping mouth of the new a6. altho if it wants to get a mouth full of the 5er's ass that just blasted by, be my guest
E class has the best looks imo, but 5er is quickly growing on me. m5 did help a lot. as for me, i'm perfectly happy w/ my 3, and maybe when i'm in the market again.. say 10 years from now, i'll see what bmw comes up with, w/or w/out bangle.