From what I can see you can either get a 40lb + car seat with either isofix OR 5 point harness. Does anyone know one that does both? My 2.5 year old is almost 40lbs, so looking to buy a new seat. Hubby is adamant he wants isofix and I'm adamant I want a 5 point harness, NOT a seatbelt which secures our son in!