Again, thanks, ljokerl :)
I was very interested in the review of the new CW31 from Meelec, as I'm not a wooden-earphone guy but I have friends who love them. Now I know how they sound :)
As for the CX-21, I had great expectations. Well, I have expectations on all the new Clarity line. When I listen music for fun I prefer the sound signature of the M11+, for example, but when I do critical listening, to spot problems in sounds, etc. I need a more neutral earphone even though I don't like the signature. To date I've been using the PL50 for that, but they are not my piece of cake and I wanted a dynamic alternative. Looks like the CX21 was what I was looking for: reasonably cheap, reasonably neutral, good design for insertion in my weird shaped ears.