Hi Richardallred,
many congratulations on the Strads! i have owned them for 3 years now (and before them the Guarneris). they are a remarkable speaker that will continue to reward you with virtually any upgrades you choose to put to them. As for cables, i have heard the Yters...not my thing. A bit dry when compared to the Transparent REference cables. i have found the s/hand market for these cables to provide very attractive pricing. i do not know your existing loom, but relative to the mid-range Audioquest cables i owned, i immediately found: 1) much, much, much lower noise floor which meant more music flowed through, 2) deeper, tighter bass, 3) a refinement across the entire audio spectrum that really suited a speaker that is known for delivering refinement in its music.
I have owned my Transp Ref cables for years, and have never felt the need to look elsewhere.
Hope that helps. just one person's opinion. Enjoy!!!
Lloyd