We recommend the cutout.
Cut Out
Cut Outs are the traditional option for an album cover where a window is cut out of the cover material and the cover prints are slipped in underneath.
Indents
Cover indentations are a modern way of presenting a cover image where an indentation (about 1/32" deep) is pressed into the cover material and the image is placed flat in the indentation and set in place with a piece of double-sided adhesive.