Hi I would recommend TKC80 for the front tyre I have currently done 5000 miles on my front tyre and it still has loads of tread on it. I am going to stick with the TKC 80 front as the tyre has very good grip on tarmac wet or dry and have had no moments even when banked over a long way.

For the rear I am using a Hiedenau K60 scout 130/80 and am very impressed with the longevity of the tyre. The grip off road is good but not as good as a TKC80 and on road again i have had no slides/moments upto now in 2500 miles wet or dry. I would say the K60 is a very hard tyre and would be wary of fitting one on the front particularly in cold temperatures
Again i am going to stick with these as my rear tyre as i find the handling of this combination excellent much much better than tourances. the only down side is they are a swine to fit to the rear wheel (see my post in tyres).

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XTz 660 tenere, adventure spec bash plate, main stand, skid marks tall screen, Oxford tail pack 36 litre. Kobra hand guards, Bigger cast footpegs, Zen overland luggage plate, USB power point, iridium spark plug, TKC80 f k60 R tyres, o2 and fuel Kev mods, DNA stage 2 filter. bark buster bar wieghts, Touratec side stand base and GPS mount. Led spot lights