What Kind Of Motherboard Can I Put In A Dell Optiplex Gx240 What Motherboard Can I Put In A Dell Gx150?

What motherboard can i put in a dell gx150? - what kind of motherboard can i put in a dell optiplex gx240

I recently completed a build boght Dell OptiPlex GX150 cases to my own computer, because I love the black and gray better than the pure black box on new OptiPlex desktops. What motherboards go to a GX240, GX260, etc., or take, or what kind of new motherboards for you?