The Kia Carens Clavis is the best option for your requirements. It's got a well thought out and practical interior and packs in plenty of seating flexibility, allowing you to balance space for all occupants. The Clavis' turbo-petrol and turbo-diesel options are within your budget. The petrol is stronger, while the diesel is significantly more efficient.
However, the diesel version will require extra care with a long highway run every few weeks, which is needed to help the diesel particulate filter (DPF) to regenerate and keep the engine running without trouble.
