Boeing guide on overweight landings (I know you didn't mention type, but we are talking general principles here) basically says that anything technical enough to require a return will probably require more engineering time than the overweight landing inspection. The aircraft is designed to land at MTOW without a problem, and I am confident enough in my skills to land. Night and VOR approach doesn't affect anything.
I would land - 7000kg of fuel and 2 hours flying time is a lot of money.