one important thing to keep in mind if you are getting manual seats is that the sport seats have an additional adjustment over the base seats. The manual sport seats have a tilt where the manual base seats do not. Both sport and non-sport power seats have the tilt. Avoid the non-sport manual seats.
So, get the sport or M-sport package. If you are the only driver then manual seats will be fine. If you share a car then power seats may be worth it for the memory function.