Dexenthes: since a lot of the plants resulting from the rc crosses lose a lot of the rc color, and the shape isn't always great, the love for them is restricted to a few good hybrids (talangensis x rc, densiflora x rc, hamata x rc), and only to select clones that turn out awesome. Me, personally, I don't mind the paler colors as long as there's good shape, and vice versa, so most look fine to me.
pmatil: merr x camp seems to be a very vigorous one, and my plant even has a basal growing, so it's a good option IF you have the room; being merrilliana derived it will probably get big. And the green amp was definitely a lucky shot: the only sprout from a batch of seeds, and it was derived from a nearly solid red female......ironically, the one amp out of a bunch of hookeriana that came from an all green female is heavily red speckled....