RE: Cermark Yak
A lot of people seem to like those Cermark 1 meter planes. I've talked to an average flyer, and he says it's a fun plane. I haven't had any experience on either of the three, so I don't really know how well they fly.
However, if it's extreme 3D you want, then a Lil Banchee X is for you. I've flown mine about 8 times now, and I LOVE it. Hovers like it's on a hook. Holds inverted with ease. Knife edge is very clean. Flat spins are really flat. Ect ect ect. It's worth the price.