Kef LS60 & Ethernet cables

I am considering a pair of Kef LS60 speakers, was wondering if anyone uses upgraded ethernet cables to the slave speaker and router. My listening space is very challenging  trying a minimalist approach. The current system is a Auralic Aries streamer, Gustard DAC, Hegel h390, Sonus Faber Sonetto V speakers, AudioQuest power conditioner. I've tried Special 40's, R3 metas, LS50s non-meta, T9x sub but the room has tile floors, 12' ceiling with glass window wall on one side. Thoughts are to keep the streamer and get rid of everything else. I've had some experience with active speakers, Genelec 8050 in nearfield but never tried active speakers in a larger room. Looking for a compromise, bookshelf speakers sounds small even with a sub and floor standers dound bloated. 

We just moved into a new home and the system doesn't work in this space so I'm thinking the internal digital correction might make a difference.

Thanks

Thanks