Well the players went thru "operation big freeze" succesfully! I reviewed both players here prior to the operation:
http://www.mympxplayer.org/15-2gb-an...ew-vt5428.html
I gave them 6/10 for sound quality. After the freezing, the 1.5" unit would be a 8.5 to 9 out of 10. This impressive result is in part due to the "upgraded" isolation I used on the electronic components to get rid of the interference. The freezing process made the music more vivid even thru the sh*tty earphones it came with (which were also freezed).
The 1.8" unit sounds much better but isn't on par with my standards. The music is vivid and really crisp (better than the 1.5") but there's so much background interference from the player itself it's unbearable. Constant popping and buzzing. I tried to isolate it better to no avail. I'm still looking around for a fix.
As for the freezing itself, DO IT!!! It's free, little time consuming and well worth the effort.