I have been a lover of the Cooper ST for 15 years. Have worn through 3 sets of them in that time, they lasted 80,000 km's each time, never had a puncture, I am fastiduous about my tyre pressures.
My latest tyres are Mickey Tompson ATZ P3 (done 10,000 k's). These basically have the same carcuss as the ST's, MT is owned by Cooper after all. However they are better in almost every way than the Coopers. Better on rocks (traction and less chipping), dirt, mud, bituman (wet and dry), maybe not so good in soft sand - still undecided about that one.
They are especially good on gravel roads, where they stick like glue even at highway pressures. Only downside is they are a bit noisier than the ST's on bituman.
I own a 4WD for its off-road ability, am willing to put up with reduced 4WD vehicle, and tyre performance on-road.
Yes they are expensive, but realiability is paramount for me. These tyres are way tougher than cheaper variants, so I only need to carry one spare (and a plug kit), thus a nice weight reduction.