Thinking more about this, the nice thing about the Vplane is it's adjustability/tunability. You would be able to dial down the gain so that it would still fly somewhat like an airplane and not like the sim so much. Dial down the yaw, and you would still need to use the rudder in rolls. But this also might work against the goal you are trying to achieve.
Also nothing against the Mikado, I have a handful of their FBL units and one of their helicopters, but in order to use the Vplane you must use their radio. We don't know how much the new Neo gyros are going to cost, but even if you pick up a Mini-vbar used (have to be careful with this as there are a lot of counterfeit units out there that will not allow you to update the firmware) for $150-200, the Vcontrol radio is going to be $750 with receiver. Close to $1000 all in.
Since you are using the Jeti, Jim, I'd look at the Bavarian Demon Cortex unit. Never used one but I've read good things about it. And Jeti and Bavarian Demon are developing the ability for the Jeti to talk to the new heli gyros they are developing and I'm assuming a new airplane one is coming as well. Much like the Vcontrol, you'll be able to adjust from your transmitter, even accomplishing the initial set up that way. But that's not out yet right now, but at around $350 the present unit would be cheaper than a whole new radio. There are a couple others out there that are similarly priced.
JR has one that is getting good reviews, but it's Xbus or S-bus compatible only.
A three axis gyro changes not only the stability, but the controllability and feel of the aircraft. Since a 2M plane still needs to be flown through manuevers, I am really not sure how benifitial how a gyro controlled plane can help you improve your flying of a plane that is not gyro controlled. But that's my two cents.
Tom M