The Guillows SE5a laser kit is one of the better first scale model kits for someone considering a first time FF or RC conversion model. I've seen about a half dozen that have been converted to small electric power RC. The dihedral, moments and tail volumes make these planes fly nicely when assembled correctly.
It's too bad they don't make the Rumpler CIV kit anymore, of course it's a bit too small when compared to the Nieuport 11 and SE5a.
Another source for interesting freeflight kits is Penn Valley Hobby Center,
Penn Valley Hobby Center /rubberFF / index/ aircraft..