When I use plywood, I use veneer core A1 grade. I use 3/4" for the cabinet. Normally, I trim the plywood egdes with hardwood lumber where the edge is exposed and can be seen - like shelves. Then I use hardwood lumber for the face frames and make my own raised panel doors out of hardwodd - no plywood.
I do use birch plywood for drawers, but I have a lot of scraps 64" long by 7 inches wide that a friend gave me from a veneer mill. They threw these scraps away or gave them away.
So far, I have stayed away from MDF core. It creeps - sags over time in shelf applications unless you support it very well. By the time you get done messing around with supporting it, you could have used veneer core and been on to other things. For plywood shelves, I try to incorporate some stiffening with the edge lumber making the trim for the edge 1 1/2" thick with a rabbet fit along the plywood.
I did make a bar for a friend that I used ash and made all of the pannels raised panels. I need to get some pictures of it so people can see it. One panel is 8 feet long and has 4 raised panels. One side is 5 feet long and had 2 raised panels. The one end panel is 2 feet long and has raised panel. It was a lot of work, but it really looks good.
I hope this rambling helps.
Rich (The Yooper)
To the world, you might be one person, but to one person, you might be the world.
Last edited by Rich Aldrich; 03-14-2009 at 09:14 PM.