If you order the Active Ventilated Seats, then you will get the Comfort seats as part of the package. IMO the Ventilation is a nice feature to have and it does slightly cool the leather (although more of it is just moving air around), but it's not cheap. And my inclination is that if you're not gonna get Ventilated Seats, you might as well skip the Comfort seats as well. It's a pity they don't offer Active Seats (massaging) in the US.

Don't bother with the 3rd row.