I lurk and seldom post because there are so many posters more knowledgeable. However, this topic is one that I've lived for about 2 years.
Being a fellow "high-end" Clydesdale I've also had problems finding the right tire. I haven't tried the Schwalbes and have heard good things about them. Its not my intention to slam them. But, a friend recommended Gator Skins to me. When I was on-line shopping for them I saw that they had a new "Hardshell" model. They were a little expensive at around $40 but I was willing to pay that to keep from flatting 3 times per month. The roads that I ride are mainly old asphalt with scattered loose gravel that would frequently gouge the side walls. It's been 3 months and not a single flat! Plus, they run smooth and fast.