It will play MP3's if you add the Eclipse Commander. Big expense simply for the ability to play MP3's.
As for the 8053, extremely good unit. Great features, great sound, great quality.
The two things that I did not like about it are that in Pro Mode you can not drop the lowpass below 63hz and there no equalization for the subwoofer output. But not everybody would consider those a necessity. I personally would have preferred to have had them.