I love the sport seats in my '06 4.4i. I've had the "standard" seat in an '04 X 3.0 for a year and they were nice but don't compare to the sport seats. I'm a tall guy 6'5" and always have lower back pain and the lumbar support is great in the sport seats. The standard seat I had did not have lumbar support. I also like the fact that I can extend the front of the seat for my thighs on long rides to give me more support.