Bear in mind that the contact area of each tyre is about the size of your hand, so you need good, grippy stuff to keep 2.5tonnes where it should be. Low quality & price 'Ditchfinders' will not be ideal. It also depends on how / where you do those 2500 miles, if motorway, then (IMO) Pirelli or Continental will give you low noise, good roadholding & wet weather performance, and good fuel economy. If mainly low energy commuting, then Falken are probably the best bet.
The other thing to bear in mind is that if there are long periods where it'll be parked up, then flat spots on the tyres will occur, you can minimise this by increasing the tyre pressure by 15psi - and reducing before you use on road.