Can't comment about the Electrocompaniet but I auditioned the CD3 against thePhilips SACD.with all reference Audio Resarch electronics and the Vandersteen model 5's.Too close to call both were musically invovlving players.SACD didn't blow it away by a long shot,but it is much cheaper and does a good job.The quality of craftmanship on the CD3 is superior and so it's re-sale value ,as with all ARC cd players ,should be good.
I've also heard the CD3 against the Metronome ,,,the Metronome (no balanced outs)didn't even come close.
I've heard the Sony SCD-1 in surround mode and was impressed with it's quiet b.g. and overall sound,it sells for the same as the CD3,build quality is high,but i didn't hear the cd playback on it and I didn't like the surround mixes.Personally I would try to find a dealer who has your electronics and see if you can listen to both .maybe get a loan out on either one of the players and audition at home.... the best way to do it .
Final comment the CD3 is that it's an exceptional player,very analogue sounding with plenty of dynamics ,detail and punch.You won't regret the purchase,as a previous poster said it is a GREAT player! And for what it's worth all the ARC players were Stereophile class A,and I expect the CD3 to folow suit.