RE: Is SIG considered to be the best kits for a beginner builder?
A lot of people like Top Flite kits, but I don't. I think they have way too complicated ways of doing things that could accomplish the same end more simply.
If built well they look good when they're finished. Take a look at SkyShark R/C. They're making some very nice warbirds that are a lot simpler to build.
As far as building goes, you put a piece of waxed paper or saran wrap over the plan.