Tvad makes a good point about resale value of modded units. Like Grannyring I can attest to the TRL Sony 900 player as one of the better CDPs I have heard. For the price it's a no brainer. Never heard GNSC mods to the Opus, but Robert at Ridge Street Audio has a GNSC modded Opus and I trust his ears.
Why don't you call Resolution Audio and ask them what the think of GNSC mods? Personally, while I trust Paul and respect his work (I own a few of his pieces), I wouldn't send the Opus to him, just get the modded Sony instead.
Why don't you call Resolution Audio and ask them what the think of GNSC mods? Personally, while I trust Paul and respect his work (I own a few of his pieces), I wouldn't send the Opus to him, just get the modded Sony instead.