Mate remember spinning the wheels will expose all your bottom uni joints and boots could leave them out in the oppen to get smashed the wheel protects them the way the offset is. Wayne Matlock uses the standard offset as he believes they are harder to turn when wider. There is an ITP option to run 10inch rims which is better than turning your rims around some people like em some dont. Mate stick with your standard offset its the best for all round riding and now Kenda are suppling the Kutter XC in 11inch for the 700xx. So now you can pick between Maxxis and Kenda and I am sure more tyre brands will follow.
Regards Overlord