Just throwing this out there because this threads at the top and I'm here
Tried out a set of Dunlop Direzza, DZ101's on the rear of the FC (rear FK452's were killed. I are burnout happy) and I have to say - GREAT sticky street tire, but pricey. The falkens were a bit harder then these, at least going by "how-much-throttle-can-they-hold" measurement. They're also nice in the rain with a slick tread pattern.
I have used aziens in the past though, good tire, but IMO there's MUCH better stuff out there now.