Good stuff
My only comment is that most CZ players don't mind playing CZ maps, it's only if they're worse than the originals (nuke_cz, russka_cz, possibly trainyard_cz) that people don't see any benefit. Dust2 and Inferno are fine, though some complain of FPS drops on Inferno...
If it's CZ maps you want, why not also use CZ only maps, such as Tides, Corruption and Vostok instead of just playing the lukewarm rehashes of well trodden 1.6 maps, just because they have "_cz" in their name? They'd also be more balanced and interesting than cbble to boot
Even so, tournaments are good! Keep it up