I have had the specialized nimbus on my last two hybrids (previous one, I bought Nimbus x38s', and my new one came with nimbus x35's). I think they ride kind of heavy. These are the 'flak jacket' version.

I really miss the 700c tom slick tires from ritchey, they only make them in 26x1.5 now, those were really supple and gave a great ride and low friction. I'm thinking my next set, which will likely be x32, I'll be going Continental or Schwalbe.