You could send your Link II to Stan Warren, and for $250 your DAC will sound like one costing much much more. Stan Warren's contact information is available at: http://www.aloha-audio.com/Linkstxt.html
There is also Dan Wright at http://www.modwright.com/msb.htm
Dan has similar Link DAC mods ranging from $250 to $375.
A couple months ago I had the opportunity to demo in my home for a weekend, a standard Link DAC III and a Link II modded by Stan Warren. Stan's versions simply sounded more natural, or as some say analog. (Less glare).