I freely admit that increasing the cost of a cup of coffee from £1.20 to £1.50 raised a few eyebrows but, on balance, I reckon it is worth it.
This is what I find most amusing about the burger or coffee run, flying an hour each way the coffee really cost around £300.
I would second Compton Abbas and Old Sarum for the cafe, also I always found Manston worth a visit, lovely little cafe and a free spitfire/hurricaine exhibition which was quite nice. Plus, it's the less appreciated lands end.