Paselas with the TourGuard belt are infamously sluggish-feeling, although the regular Paselas are reported to be one of the fastest rolling tires (per Jan Heine, Bicycle Quarterly), although the Grand Bois that Vik mentioned are indeed the top dog. The Rolly-Poly's are reported to be pretty sluggish as well so you may want to veer from that direction. I currently am using some Garneau Go!s, which are just Kenda Kwest in a 700 x 28, but do not know if these are still available. They are pretty decent, tho.