I'm almost too anxious for the next contest too
It should be starting with the arena unfreezing soon.
Very awesome terrain, and I love the atmosphere. I wish you would have waited to use this for the contest. Anyway, the first one looks the most epic to me with everything fitting together very well. These remind me of the hell level of Diablo 2.
The only one that really looks out of place is "WC3ScrnShot_063012_192300_05.jpg". The stone flooring is messy and looks like it would be very glitchy in a playable map. I guess that wouldn't be a problem if you're just using this map for terrain, but I would use a different stone tile or doodad altogether for that area. The third picture also has some messy terrain spikes under the nearest bridge, but I'm sure you didn't mean to leave those like that.