In case anyone searches for this in the future, i have gone for 265 75 16 tyres, reason being i was concerned about the extra diameter of a 285 tyre. It would throw the speedo out and put a fair amount of extra strain on the tranny etc. They would effectivly be 4" greater in diameter!, so at 60mph on the speedo i would be doing nearer 69mph !

Also, the 265 tyres are going to sit nicely under the arches with an OME 912 lift without too much cladding trimming, meaning i don't have to jack up the front more than 2" causing CV boot ware aswell,

Thanks for all the help !