So after a bit of research I opted for a second hand set of Amarok alloys. New tyres are 235/55r18.
I thought about 60 profile but the 11% increase in size over standard I suspect would've made it a bit slow and 60 profile is a tight fit.
I also considered Range rover alloys but didnt want the hassle with spiggots, new bolts and possibly spacers.
The Amarok alloys fit perfectly and the difference in tyre size is offset by the slightly different wheel offset.
no rubbing, the tyres don't stick out and there really is very little noticable lack of performance, these work out to approx 4.5% larger wheel diameter overall. I think if you stay under the 5% it all but makes little difference.
The bonus is, my speedo is corrected to within 2kms an hour. Most modern cars have ambitious speedos, check with gps to confirm yours. Previously at 100 indicated I was doing about 92. Now at an indicated 100 my gps reads 98.
Happy with the look too, standard springs, not lowered. 2016 250 runner, not chipped either.