You might want to look into the BZ MiG-21, it's a bit smaller than the FB and it's not an arf, so you do have to get your hands dirty. The prefabrication and quality is excellent though....and for a pretty OK price.
I picked up a kit last year and am planing on getting her together next winter....

Weighs in at about 20-22lbs and should fly ok with 16-18lbs with power to spare. He does reccomend 22lbs+, but that just makes it a rocket.....

http://www.bzmbau.de/pageID_5211816.html

best regards
Hank