Help me choose:Dali Helicon 400mkI or Avalon Arcus

Looking for opinions from users of these two beauties, I need the best overall performer for all types of music, metal, progressive, acoustic, jazz, vocal, opera, classical etc. I love it all. My room is 30x 20 with vaulted ceilings. And no I cannot audition either speaker. Looking to run it with an Audio research amp straight thru a wyred4sound dac2 to Mac Mini, lossless. Thanks everyone and Happy New year.