Had Rosso 2s as my last two sets and 4 sets before that were Diablos. Never got less than 6k out of a set, had no issues with squaring off, have done most of the mileage two up and loaded round Europe in all weathers on all kinds of roads at all kinds of speeds and can honestly say Ive never lacked grip,feel or confidence in any conditions, dry, damp or fucking wet .Yes the Rossos cut up a bit at the edges but that shows theyre working, and the centres rip a bit after fast AutoRoute rides but don't square off
Over the years Ive used most tyres on all 5 of my Fazers so the bike is a constant and the Pirellis ( Rossos ,Diablos Angel st ) have been the tyre ive had the most confidence in followed by most flavours of Bridgestone. Worst have to be Dunlops and one set of Michelins which I binned after 100 miles .I know how my bike should feel and with those tyres on it was shit , so I wont succumb to the Michelin hype anytime soon
I an ideal world you would be able to try each one to find which suits you best and go with that one but the world aint ideal .Its cost me lots and many miles to try tyres and the conclusion Ive come to is Pirellis suit me, my bike and how I ride .They may not suit you