What should I look for in a cyclo cross bike This will be my first cyclo cross bike and I am already using the same techniques with my mtb.
My question is what should I look for in it. Since the country I live in does not have any official brand manufacturing cyclo cross bikes, I have to look for the nearest replacement.
So what should I look for, like rigid frame, type of brakes gears, anything such

My use is based on high speed sprints and short length moderate offroad  use

A few more things carbon fibre frames are not easily available so I prefer other materials, I live in a rainy place(recently its been more rainy for past 2 years, likely to continue in future)
Not much to go on.  Disc brakes for wet.  2x set up if you are going to use is on the road.  You probably want clincher wheels.  Aluminum frame.   

Not technically a CX but a bike like this http://www.trekbikes.com/us/en/bikes/city/fitness/crossrip/