The GP Extra is a great airplane. Flew mine for the first time this season last week and I couldn't get the grin off my face. I have just six total flights on it, so there still is the 'new airplane awe' factor going on, but I love it. I have a DA-100 on it with hitec digitals all around and I couldn't be happier with the combination. It's not a 3d airplane in the stock configuration as it can be overstressed by violent manuvers like blenders etc. But for a strictly fun/IMAC airplane its great. Little to no knife edge coupling and the up/down lines are very impressive, lands like a trainer. Not sure about the Zen. 80, some have said that it's a marginal combination, but having said that the DA is almost too much power, if that's possible. It's a good airplane, you'll enjoy it.