ARC DAC7 versus Stello DAC220

Has anyone compared ARC DAC7 with Stello DAC220? I finally (I hope so)bought my final system but I have a doubt, about if update or not, my DAC Stello 220 to ARC DAC7(or something until $5k).
My setup:
HTPC, Tranport Stello, Pre ARC Ref3, Power ARC Ref 110, Speakers Volent VL2, IC's Synergistic Research D3, Tesla Apex, Tesla Precision, SC Acoustic Zen Absolute, Power Cables Lessloss Signature, Synergistic T2 and T3.
Thanks in advance