If you want a more budget priced tyre, don't ignore the Cooper Discoverer ATR. I had these on for a year and they're a great all round tyre. Not surprisingly they really don't like mud, but I found them excellent on dry tarmac, wet tarmac, 0.5m flooded tarmac (!), grassy fields and on ice and light snow.
I changed them because my D2 is on the portly side (permanently mounted roof tent etc) and bogs down easily, so I fitted some second hand BFG ATs. These live up to their reputation, but they do hit your economy by 2-3 MPG and are a tad noisier than the ATRs.