If you have kids go with black or tobacco. I really like the tobacco because it is dark enough to hide the dirt but rich looking too. I also thinks it pairs well with the rest of the black interior especially when enhanced with the anthracite headliner that comes with the sport pkg. Mine came with dark burl which I like too. I also like a darker contrast interior with the white exterior so I would not go with beige. Just my opinion.

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2007 X5 3.0 Alpine, Tobacco, Dark burl, Prem, Sport, Tech, Rear Climate, 3d row, Running boards, Ipod.

2006 530i Amythest Gray, Sand, Dark burl, Sport, Comfort seats, CA, Sat and best of all 6 speed.

Retired:
2007 X3 (auto)
2004 Z4 5 Speed, Sport (RIP)
1995 325i
1989 325i