Sorry for the wisecrack about the LA 40 -- I just couldn't resist it. However, the point that I am attempting to make is that if you are bored with a Superair powered by an LA .40, you will be quickly bored with the others if you use the same powerplant. The Superair is much more exciting with something like a TT .46 Pro in it, and that is a good way to start raising the excitement level.

A word of caution -- unless you fly well & are also prepared to do some significant mods to the horizontal tail, avoid the BH Spitfire. It is prone to shedding its elevator from flutter. Even if you fix that problem, it is a real handfull on take-off & landing, plus it snaps hard if you apply too much elevator at high speeds --- not a toy for an inexperienced flyer. I had to trim off the balance tabs, double all of the elev hinges & sheet the stab & elev with 1/32 balsa to stiffen the tail of my BH Spit. If you can live with the mods & tricky low speed handling, it is really fun to fly (as long as you respect its flight envelope). Again, a TT.46 Pro, or something similar, is what is needed for the Spit to perform well.