I normally ride with a Conti 4 Seasons in front and an Armadillo in back.

I consider the Armadillo the most flat-resitant tire available.

My lbs confirms the Armadillo as the most flat-resitstant; and they rate the Conti Gatorskin as second but with much better handling.

For that reason, I have recently purchased a Conti Gatorskin and will mount it tomorrow and see for myself.

I have ridden the Panaracer T-serve and really liked it, and would consider it again as a front tire.