If you are willing to spend the money for two gyros, spend it instead on a plane capable of 3d maneuvers, and more importantly, 3d recovery. Get a funfly type plane, topcap, magic, seduction freestyle, etc, or any of the other planes that people rave about. Build it as light and straight as possible, balance it laterally as well as the usual cg direction, ask on RCU for right and/or downthrust recommendatins, and fly the snot out of it. All gyros are going to do is teach you bad habits that youre going to spend more time learning to correct after you take the gyros off. Gyros will also add dead weight to a model(which you will want to despise on a 3d model). 3 additional oz definately makes a difference in vertical authority. Id also be curious as to how many planes are lost on maiden flights with gyros (specially used gyros bought from other fliers) because they arent configured properly (gain too low/high) etc.

Good luck,

Steve