Yeah, I was going to say - you can go for the Tourguard (or TG) version and get flat protection.
Or their next tire model up is the Panaracer TServ, which I always liked and used before my current tires.

Nowadays I ride Continental gp4000's on all my road bikes. If you order them from Amazon they're $45-$55 / tire. They're not cheap, but they have both faster and grippier tires which is pretty cool. They have good flat protection to. I don't know how to rate them since I haven't really gotten any flats on the outside of my tires with either the tservs or the gp4000's.