My '06 4.8 has a staggered setup and you can't do a front to rear rotation if you have the same size factory wheels, unfortunately. I replaced my Michelins with Bridgestones and they have worked out great. The ride is a little smoother, and the overall performance is not any noticeably different. They cost half as much too. I got only about 16Kmi out of the Michelins, and the Bridgestones are probably going to last at least that long, or better from the looks of it so far.

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'06 X5 4.8is, TiAg/black, cold weather pkg., comfort seats
'07 750Li, TiAg/black, sport pkg.
'05 Ford F350 silver met./slate gray, Lariat, 6.0 PSD, CC, DRW, FX4