My favorite is the Conti Gp4000S very low rolling resistance good grip, good puncture resistance
I had a set of Schwalbe(sp?) they were ok but didn't last long and were very prone to punctures
I'm a big boy and run ~120psi and do 40-50mi a day in season, 6k mi last year, last long and puncture resistance are #1 & 2 on my priority list
here's one interesting study comparing various tires