The stock tires on my Surly are Ritchey SpeedMax Cross 700 x 32c. I keep them inflated to 80psi most of the time. I really don't have many complaints about the way they ride or their weight. (I don't have much to compare them with, as I've never put any other tires on this bike.)

I'm of the mind that one should use a piece of equipment for as long as possible before replacing it. (Being a grad student for so many years will do that to a person.) Hence, I have not considered other tire options until now (my once 'knobby' cross tires are now slicks . . . )