you might as well be asking us which kind of cologne you should buy-- in all my years of riding and working on bikes, i have found that tires are WAY too personal to take anyones recommendations seriously, unless you know their riding style, and they know yours...
Really like the 2cts,Igot about 1200 miles out of stock tires,they were good but I'm sold on the 2cts.To me they just do everything better.They have great feed back,give them a try.
i would go with either the supercorsas, 2cts, qualifiers, or m3's try them all and your preferance, everyone likes a differ one honestly, but don't run the corsas they are too hard for a 999 in my mind...