I love concert toms! And I'm not ashamed to admit it. :)
I'm a huge Genesis fan (and I have no shame in admitting that either), so the sound of a kit with a million concert toms is music to my ears. I love the "barking" tone that Phil Collins gets on his Gretsch set. Check out the 2007 remixed version of "Abacab" for an incredible drum sound.
After dreaming of building a concert tom setup for ages, I came across a bunch of orphaned Ludwig concert toms last summer and picked them up. I just nabbed a bass drum a couple of weeks ago, so once I'm done rewrapping my Ludwig Combo set, I'll start in on the concert toms and put together my prog rock kit. The sizes are 8/10/13/14/16/22.
I doubt I'd use it as my main kit, and I'll probably never have a gig that would call for a giant concert tom setup, but it'll be fun to play "Los Endos" in the basement.