I guess I'm against MDF because of the effect humidity could have on it. Look at a 10 year old couch with a lot of MDF in it - the MDF is what is failing in the structure - all the real wood is still holding strong. I suppose if it's painted on all surfaces... I have never spent this much on *speakers* before. I would feel a lot more confident if I thought that they would last a long time. I don't want a guest leaving a drink on the subwoofer, and finding a nice fat ring welled up there tomorrow.