Another interesting tire is the
Vittoria Terreno Zero. I have these in the 47-584 size, but they're also available in 40-622. With their slick tread, they're pretty dadgum fast! For a little more bite, the trusty Continental Speed Rides are also available (marked as 42mm, but are a true 38mm tire) at a much lower cost (about $25/tire). There's something good for all budgets in this market segment.