ORIGINAL: Fastsky
I know its a high wing but the Phoenix Decathlon looks great, is a good size, is reasonable price, is aerobatic and with a 46FX on the nose would have high performance. Mine has a ASP 52 and it doesn't need that much engine(its fun though!!).
Phoenix must be really loose in their production. My Decathlon weighed 6lb 8ounces when clean and new. And with a 46AX in it that had been pulling the firewall out of an Ultra Stick. If flew ok, but was anything but a 3D airplane.
In the last year and a half, I've done 17 ARFs for myself and others, and my Phoenix Decathlon is roughly ONE POUND heavier than most of the others and 1.5lbs heavier than the lighter ones. When the 55AXs came out, I retrofitted one of them to see if it'd improve the vertical on the Phoenix. It did improve it, but it's still a very heavy model and really has no "vertical" to speak of.
My advice is to go into Tower's website and click on the 40-size ARF category. Click on for any that look good to you and see what Tower says about the weight. Then look at the ailerons. If they're strip ailerons, it's probably not going to be very good at 3D. If Tower doesn't have anything, give Chief a shot. Their website index makes shopping for an airplane almost as easy as Tower's layout. If you don't see anything there, try Horizon Hobbies website, but be prepared to a very user unfriendly maze. They don't make anything easy to find. But they do carry a line or two that others don't.
I'd second what Cazier said about the profiles.