i have the 35d with sport seats and love them.... they feel like they hug my body better. i have mainly driven sport cars for my last three cars so this feels super comfy compared to them; however they aren't too soft. i drove a few x5s with regular seats and i thought they were too flat and generic feeling. everyone that has sat in my car says the front seats are very comfy and comment on how nice they feel. so my vote is def for sport seats. if you want a seat to fall asleep in get a lexus.