When we were at Office Depot looking for a new office chair, we decided to look at the file cabinets also. We have been talking about getting a new one, as the one we had was overflowing.
We ended up purchasing the RS to go 4 drawer vertical file cabinet. It is 51 ½ inches. I like it because the file drawers themselves are nice and deep. They hold both letter and legal size files. They have hanging rails and the sides are deep enough that you don't have to worry about papers spilling over.
It is laminate and this brand comes in 3 different finishes, we decided on the medium cherry laminate.
As an added bonus the top drawer locks for added security. Now I suppose if someone really wanted to get into it they could, but it's nice to be able to lock some papers you don't want others to come across.
I don't have any complaints about our new file cabinets. It is big and plenty of room. I am still in the process of filling it up.