Bud, just get an Avistar and get it done.......I've had each of the planes that you've considered so far and, apart from landing a bit faster and flying inverted a whole lot better, there's no difference between the Avistar and the rest. A flat bottom wing gets really boring, really quickly. A semi-symetrical wing like the one on the Avistar performs much better all the way around. But that's just my opinion.