http://www.edmunds.com/insideline/do/News/articleId=107689
I must admit, it's tempting. The one big flaw with the Z4 was the all-electronic steering, and it seems that Group M has scrapped that in favor of a power-assisted hydrolic unit. The styling still looks like a suit someone slept in, but it is not as bad as the original Z4.
Is it a 987S killer? 3300 lbs (Z4 M) vs ~3000 lbs (987S), but 343 hp vs. 280 hp. Probably 0-60 in about 0.3sec less than the box S, from what I've read so far.
tmc
(who just traded an M3 to buy a 987S)