Continental ContiExtremeContact 215/50/17 new as of yesterday from Discount Tire $600 out the door. I previously used them on my retired Acura and had nothing but great performance in all conditions and especially snow in Michigan (~ 100k miles of experience with this tire)...also wore very well. Many other Conti's are not all that great from reading reviews and personal experience, but this one has really good reviews @ Tirerack.
Went with the up size and love it on my '06 M5...less jittery handling and it is more proportioned look, but still reasonably low profile. It's a family truckerster, so extreme handling doesn't apply to our driving characteristics.
Thanks to this thread for getting me to look at this new tire size. I was going to include some real pict's on the Mazda, but the tires are already covered in salt.
SparcEE