Number 1 beginner mistake: Focusing too much on the plane.
True, you can't do this hobby without a plane, but the point is the doing.
Do you plan to join a club or know a few people who are already into RC flying and will help you? The Sig kits listed above are all very well proven designs, but you'll need piloting skills to be able to fly them. I don't say that to discourage you, just to help you be successful.
So, if you want to fly the larger planes like those above (and have the budget for it), look into joining a club first. Most offer training, so you can work with an instructor even while building usually.