Interconnect conundrum

I indeed have a bit of a interconnect cable conundrum. I have 2 balanced cables, one being a harmonic technology Magic Link and the other a Nordost Red Dawn. One to be used between the Amp to preamp while the other from my Phono line stage to the preamp. In your opinion where do you think I should use the cables? Of the 2 possible connections on my system, which 1 will maximize the more expensive set being the Nordost to its fullest on my system. I currently am using a BAT VK 30 paired with a Bryston 4B-ST. My phono stage is a GCPH with balanced and non-balanced outputs.Any thoughts or advice would be much appreciated.