help! vertical or horizontal paneling? i will be attaching 4x8 full sheets of mdf "plank" paneling to the walls. each "plank" measures 3 1/2" wide. also should i run tile or "plank" on the front facing (4.5" w) section of my knee wall? please help me decide if i should run my paneling vertical full wall height; 2/3 wall height and capped with a pale color above or full wall horizontal.