Ayre C-5xe to Kii 3 speakers using AES

I am in the process of getting an Ayre C-5xe and want to hook it up to my Kii 3 speakers. To do so I need a 1.5m AES/EBU cable Preferably used and under $650. I chose 1.5M because I read that digital cables work better if they are 1.5M or longer. I have no information to dispute this so I’m stuck with it. As for choice I see a plethora of options and am overwhelmed. Kimber Kable Illuminations Orchid has an amazing review, also AudioQuest Diamond and Vodka have been suggested. Then there are such names as Cardas Clear, DH Labs D_110AES/EBU Silver Reference or Silver sonic, Acoustic Zen MC2 Absolute 110 Ohms and Acoustic Zen without the Absolute, perhaps one is Silver and one Copper. I would like to have some idea of where these cables fall on a scale of Good, Better and Best. Also should I stick to the 1.5M rule or not because 1M will be long enough to do the job.

Please tell me your favorites and why.

Thanks for your help.

Casso.