Never tried Nomads, but Dragons and X97 both slide great. And the rougher the surface the better they slide.
Dragons sound and feel soft, and grab metal, but X97's sound and feel really close to a 99a, don't grab metal, but smooth out crust better than they have any right to. They're FAR better than 99a Spitfires on asphalt and chunky sidewalks.
I like 99a F4's a little bit better than X97's, but I skate 90% smooth skatepark. For Street or crusty park, X97's would work great.