Magico S1 owners - speaker cable suggestions

Nice choice Imaginett on the SR Element Tungsten cables. Magico were using Synergistic cables at CES this year. I will have to check those out. And yes they would be a big upgrade from your old Holigrams. I'm enjoying the natural/organic sound of Jorma Prime with Vitus and Magico, but it's matter of personal taste.

I own Magico S5's and use Jorma Prime cables in my system which sound
smooth, natural/organic, harmonically rich and overall neutral in tonal
balance. The Primes also have a touch of warmth. Jorma Unity or Origo
would be a good match with your KWA-150 & S1's. Origo is better than
Unity & more neutral. Unity sounds a bit warmer, but has a bit less
resolution and coherency. Jorma is also good value imho. Siltech Royal Sig
series also has excellent synergy with Magico. By way of comparison I
would say Prime sounds a bit more 'delicate' than Siltech Royal Sig (which
has more pronounced bass). Which cables are best would be a matter of
taste, room considerations & budget.