I've sent my custom quads' cables off to be reworked properly for the Fisher reshell. In the meantime, I decided to pick up both of the OP's recommendations from Job Lots to play with. I'm NOT going to compare them to my customs, LOL.
The Metalix - I may keep regardless due to their excellent mids. They're still burning in (only about 10 hours or so) - but the mids are forward, smooth, and warm. A little less detailed from what I remember in comparison to my old Re0's, but warmer and more lush. Unfortunately, they don't do anything else very well yet. I find that they're rolled off in both the lows and highs. Soundstage is definitely within the ears so far, separation is decent, placement is impossible. I'll keep them, but can't recommend them unless they really open up with burnin. Also - build quality is pretty much crap. The headphone cables have to be split, there's no slider. The paper filters aren't even centered on the nozzles properly - and one of the forgettable tips had a tab of rubber still left over from the manufacturing process.
The wooden ones I can't really comment on until they burnin more. The build quality is better than the metalix, but they still don't have cable sliders. They do have metal screens and a 45 degree jack. I never owned the CX300's (just the CX500) but that's what I think these must sound like with overwhelming muddy and bloated bass. I just haven't been able to listen to them for much time yet, because the experience hasn't been pleasant. Hopefully the mids and highs open up with burnin like the Lenntek Sonix did.