Whilst you have a baby go four doors as it is a real pain getting them in and out of a 3 door, especially when having a sleep or worse when the tantrums start and they don't want to get in the flipping seat. Then when they get to about 4 you can go for a 2 plus 2 as they have short legs and can get themselves in and out and listen to threats of losing toys for a while if they won't get out or in.
Having said that I used to use a 911 Carrera for a while as my daughter just sat in the front but you could squeeze them in the back if needs be. Funnily enough your budget would buy a 996 911...lob on a private plate and the neighbours think it is a Bentley replacement.....I am amazed by how many people don't know one age 911 from another.