roberjeman, erik_squires, stereo5, teo-audio, and don_c55 thanks for all your feedback. I've been happy with the modded Adcom but you never know what you're missing until you hear it. Didn't know if ARC offered more than the Adcom. Sounds like I'll just keep my money and be happy.
Audio Research D240 mkll vs Adcom GFA-555
Hey Folks, I currently have a modified Adcom GFA-555 but have the opportunity to purchase an Audio Research D240mkll. Will there be a significant increase in sound quality? Speakers are Sonus faber Chameleon B's and source is Tidal through a Project Pre Box S2 Digital (as preamp).