The esky 0704 is a popular low cost rate gyro that is often found in low cost rc helicopters. It has a fair amount of drift and it only has a single axis so is probably not suitable if you want pitch and roll. The output of this gyro is a variable pulse width so its not quite as easy to integrate as an analog or i2c output gyro.
The other link did not work for me so I can't comment on that item.
You may want to look at the wii MotionPlus. This is a three axis gyro at an excellent price and a few people here have integrated it with Arduino.
Because gyros indicate rate of rotation and they all have some drift, you may need some other sensor to indicate when the plane is flying straight and level. A search for one of the many discussions on UAV (unmanned aerial vehicle) should turn up plenty of info.
Have fun!