Well if you have the tools, wood would look better IMO. I am seriously considering using a light wood panel like birch for the walls, or maybe even some sort of light colored woven material applied with resin. Nearby I can shop at a boatwrights' wood store that has every kind of unusual wood and I have seen some slabs that would be sweet as a bar. I am just not sure if I want to deal with the maintainance. I may also do some kind of bookcase/bar combo as I had originally planned to put a large flat screen TV where the tank is now, surrounded by shelving and shallow cabinets.