That "GSP" giles will turn out very light. I am building one and it will tip the scales at 4.25 lbs with an OS50. Bare airframe (no engine or radio gear) is 2 lbs.
The plane is available from other sources at lower price than GSP, it is made in China and sold through many distributors.
Biggest problem with it is the tail is very light and the nose long, it will come out nose heavy.