[TahoeM3]

I had the M and sold it, and now I'm getting back into a 50i M-sport. The down side of the M is the transmission and resulting gas mileage, which can add up if you do a lot of commuting. If it had the 8-speed automatic or even the 7-speed DCT, it would be much better as a daily driver. If you have a lot of commuting miles as I do (100+/day), then getting 13mpg and refilling your tank every other day gets old. If they could fix that, it would be pretty much perfect. I miss the M, but the 50i with M-sport and chip (and maybe some other goodies) will be a good compromise. If you are driving <50 miles a day, then no question...get the M. The only other thing I don't like about the M is the squinty shape of the X6-style headlights. I prefer the regular X5 ones.