If you're familiar with
ETC already, it may be a good buy. The biggest Express console they have is a 144
channel, so, assuming you don't need all 192 dimmers avialable on faders, that would work.
I assume the Colortran rack sare
DMX, I couldn't fidn any definite fact when I looked at the spec sheet. Assuming they are (or a conversion is available), the ETC deks will work fine with them. You might need to goof around with
dimmer profiles if the board has something like this, as it's probably optimized for their brand of dimmers.