I'm going back to work in February when ds will be 7 months. As dh will be dropping him at nursery and I will be picking him up, we need to get a second car seat. I currently have a maxi cosi with isofix base, which does fit in dh's car, but is really awkward to put in and out as it is a 3-door with sporty sloping roof. Ds is 9kg now, so could we buy a forward facing car seat for dh's car, or do we need to get another rear-facing one?