Just bought a pair of Ardent 2.4s today for my "AM" bike. They look great & only weigh about 775g so v.light for the size.
These are to replace the Minion 2.35 XC Kevlar Tyres i bought a week ago. I just prefer higher volume so I can run a bit less pressure in them. I used the Minions once and they grip/roll well but I want to go back to big volume as I used to run Schwalbe fat Albert 2.35 before.
The Ardents have a good medium depth tread that looks like it will roll fast. I think they would make a good trail riding tyre. The Advantage tread looks a bit light to me. I tend to keep one set of tyres on my bikes normally & dont change them so i like an "all rounder" design like the Ardent.