Ive always hired a capsule till around the 4-5 mth mark....then go with the baby seat. Ive got my first at school this year so will have a newborn doing the school runs, so a capsule defn easier for me than getting a pram out of the car.
Also if i pop over to a girlfriends house or something, thats all i want to do - pop in.Not lug in my pram, or something for baby to sleep on....baby can stay in capsule asleep if need be.
Im having a near enough winter baby too, and i just find baby being in capsule provides a bit more protection from cold and wet when transporting in and out of car...

Good luck with your decision!