dwayner I used to use bridgestone, but in australia, they dont stock them anymore I had the slightly larger ones by falco, only a little bit bigger, and they seem to be going the distance a lot better - maybe try them - ive had them over a year now. They are also about 30% cheaper than the bridgestone.
just had a pair of Nankang NS2 put on the front (£55 each all in). Initial impression is they are a bit less harsh a ride than the federal formozas that were on there before. worth shopping around, they also did bridgstone at £65 whereas 1st place i tried said bridgestones were £78