To have a clean line, laminated finish is the best solution. Just like the drawing attach by u, that can be done only by plywood with laminated finish. Melamine cant do so. and of coz acrylic also cant from what i know, coz at the back of acrylic is also melamine. However, Melamine still can be done by the similar way, which doing a normal shape door but digging a hole on the bottom, that become your hidden handle.

Usually user that don't like handle, this will be the best way. Laminate will much more color choice compare to melamine, and for solid color, some of the color can have glossy finish and Matt finish.

Melamine = Chipboard, compress wood, color is ready in pcs when out from factory.
Laminated plywood = natural wood ply, and finishing color by lay a pcs of lamiate on surface.

even i facing all this material everyday, but i do not doing research about which 1 is batter. Is only depend what u want. Price is about similar to us, Melamine board are material expensive but labour cheap, Laminate material cheaper but labour expensive.