I just started building my new cabinets for our kitchen. I am using birtch plywood
for the insides and red oak for the panels and faces. I have to tell you that they
look awesome (so far). The white birtch insides (guts) really brings out the oak and
of course puts out much more visible light whille looking into the cabinet bottoms
So I say, " Use birtch. It is a fine specimen."
I used 1/2 " birtch plywwod for the backs bottoms and sides. I used 3/4 red oak on
all visible outside panels. I used red oak on all faces, panels, styles and rails.
Good luck to you.