I can only speak to one of these DLGs you've suggested. I assembled an NSP Apache for a friend. It went together well, 4 Hitec 55 servos, 350 mah NiCad pack and Berg RX. I set the CG to the plans and it is much too nose heavy (used xpoxy and lead shot in the very nose) [>:]. We are slowly drilling this out and sending the CG aft.

Given your flying full house sailplanes, I'd go with an aileron DLG. I'm looking into one for myself in the near future. Check the RC Groups web site. There is a whole forum dedicated to DLGs. Statements there will indicate this is not an ultimate contest ship, but is a good first higher level DLG.

John C