Lexus discontinued the IS in the UK a while ago. If you're open to the idea of an SUV instead of a saloon, the NX would give you a similar experience in terms of comfort and the use of a petrol hybrid drive system. Although you're open to the idea of something from another brand, Lexus is unique in offering premium full-hybrid cars, where rivals like BMW and Mercedes instead use plug-in hybrid setups, which are a very different ownership prospect.