A 45fs isn't much engine for 3d being a ys might help a bit
the funtana 40 needs a good bit of engine just to fly and would be very boring under powered
I think you'll have to look at a profile under 48'' have you flown them and just don't care for them if you haven't then
I think you'll be suprised at how well the fly

[link]http://ohiomodelplanes.com/47yak/[/link]
[link]http://morrishobbies.com/product_info.php?cPath=22_150&products_id=59&osCsi d=ca2206b63f183a1acc88a7a3a7722ad8[/link]