If you want a play-only unit with a more powerful amp, see if you can get your hands on an Aiwa AM-HX150. It has a total of 16mW out. It has, however been recently discontinued and replaced by the HX400 with only 7.4mW out. I have the HX400, and it does sound fine to me. They are both Japanese models only, though.
I could suggest the E707 as an alternative, or the MJ88 by Panasonic, though it lacks MDLP and has a 7mW total out.