I bought the OK3 a while back, and I've been enjoying them for the most part but I can't seem to get a good fit.  The rubber(?) covers are the worse...the only way I can make them fit is by using the soft covers.  But after a little use these seem to lose their ability to fit as well.   I...

I bought a uDAC almost a year ago, and it's been working great so far (minor issues, but nothing major).  I'm currently using it for both headphones (ATH-m50) and speakers/sub through RCA out, each about 50/50.  Would there be a noticeable improvement in upgrading to the uDAC-2?  The $65 upgrade...