I'm running Sport Attacks on my ST4S - replaced Diablos and apart from the profile allowing the bike to drop into corners a little easier they are no different. Excellent in the dry & wet... as for wear, not done enough miles on them yet. Apparently they were designed by the guy who designed the Diablo for Pirelli. Well worth a try
I had a set of Road Attacks on my SS and I'm now on the 3rd rear and 2nd front on the ST4s. I have never had any concerns with them and find them excellent both wet and dry. Rears are lasting me 3 1/2 to 4 thousand miles and about 6 1/2 on the front. Works out at about 3 rear tyres to 2 front ones.
I had conti road attacks on my 999 last year, good in both wet,dry and touring, as the tread seems deeper than other tyres they seem to last alot longer than others.