Tnx,
I figured it was probably a lot harder to interface one them with the arduino because I hadn't seen anyone else do it 
The link was for a MLX90609 Gyro Breakout Board wich I think i'll go for.
I was thinking about Accelerometers and what use they may be in this case but what kind of sensor could you use to "indicate when the plane is flying straight and level"??
I'm off to search the UAV posts as suggested, thanks again.