Rapet, I own the ARC REF CD-8, which is based on similar technology as the CD-5 -- at least respect to the DAC. I think my CD-8 sounds great, but I cannot in good faith recommend ARC over the MAC. The reason is I have no idea how either piece will sound to you in YOUR system.
OTOH, if your linestage/preamp is ARC that is an important fact that weighs in favor of the CD-5. Reason: system synergy. In my opinion, ARC gear seems to simply integrate and work well with each other -- no surprise.
Perhaps if you list the rest of your equipment, particularly your linestage/preamp, other members may have some views.
In the end, I think most would agree the choice should be made on what sounds best to you in your system.
OTOH, if your linestage/preamp is ARC that is an important fact that weighs in favor of the CD-5. Reason: system synergy. In my opinion, ARC gear seems to simply integrate and work well with each other -- no surprise.
Perhaps if you list the rest of your equipment, particularly your linestage/preamp, other members may have some views.
In the end, I think most would agree the choice should be made on what sounds best to you in your system.