Ash530

I've been researching the 530xi Sport Wagon and the A6 Avant. I was pretty much set on the 530xi wagon but I've run into two minor issues. The first is that the car (the way I want it configured) would have to be ordered from BMW (can't find anything on a dealer lot). The second is that I just test drove a new 2007 A6 Avant S-line. The A6 Avant S-line really handles really well, much closer to the BMW. The A6 Avant S-Line also comes with 19" wheels a back up camera and some other new options. So, now I'm wavering again. Any opinions on what the pros/cons are for both wagons is greatly appreciated.