BSM and AW both go great w. Sav Beige IMO. Both are classic BMW color combos, so you cannot go wrong. I personally test drove a BSM w/ Sav Beige and grey poplar interior and it looked really sharp (almost got it, but went with BSM/CR instead) - the grey poplar looks great with the beige - brings out a hint of steel blue in the poplar in certain light that adds a nice dash of color to the interior.
I also agree with the other posters regarding the M sport - definitely get it - you will not be sorry.
BTW - for those who mentioned SGM w/ Sav Beige - recall that this is also a classic combo that was used throughout the 80's on both the MB 560SEC (large coupe) and the 635csi and still looks fresh and great to this day.
Just my $0.02.