I'll put a shout out for my current bike, Aprilia Caponord.
Range of around 240 miles is pretty easy, and it isn't a huge beast like the specialist tourers. Auto adaptive suspension is perfect for cruising and then pushing on, and it is so unloved and undersold that second hand models are incredibly good value compared to the Multistrada and similar bikes.
Low speed fuelling is an issue though, and cruise control, if you use it, is clumsy.
You should be able to pick up a two year old for £9,000 or so.