My GS1150 originally fitted with Tourance, good mileage but not brilliant in wet. Then changed to Bridgestone 020, very good wet and dry, fair mileage and had three sets, then went to Trail Attacks, again very good, sold bike before the tyres wore out.
I have Dunlop Roadsmarts fitted to my Triumph 1050 tiger, they are excellent in all conditions, better than the OE fitment Michelin Pilots. My Guzzi Stelvio was fitted with Pirelli Scorpion Syncs, gripped OK, but felt a bit vague and rear wore out quickly, have just replaced the Pirellis with Conti Road Attacks, which I expect will be well up to the job. My R100GS is fitted with old style Tourances which seem to suit the bike well.
Taking the above into consideration I cant say that any of the tyres I've had fitted have been particularly poor performers, at worst some were adequete, but some others just felt better in terms of grip and feedback.
So long as you don't buy a set of Teflon non stick tyres you'll be ok with just about anything from the major manufacturers IMHO.
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