Here in AZ I really need flat protection if I want to finish a ride. My favorite tires are:

1) Panaracer Pasela with liners or puncture resistant tubes.
2) Gatorskins
3) The Performance Vredesteins (blue) which can be pumped to 160 psi and can usually be had for about $24.

The problem with most of the Schwalbe tires is that they are VERY heavy.