For now, keep the Marinco connectors on the cables.
DH Labs Power Plus => use on Exposure 2010S2D amp because this is the largest cable (11awg) and you want the most amount of current available for the amp.
WireWorld Aurora => use on the PS Audio NuWave DSD DAC. This is your best quality cable because it’s silver-clad instead of silver-plated and it’s a larger awg than the Furutech cables. You want the best quality cable on your source. Essentially, if the sound quality is not there from the source (beginning), there is no magic you can use to get it back.
Furutech G320Ag-18 => use on the headphone amp because the connectors on this cable are gold-plated pure copper (FI-15ME) and are better than the Marinco (brass).
Furutech FP-314AG + Marinco => use on the PC. The brass Marinco plugs work effectively on a PC.
Once you have all this in place, listen to some music through external speakers on the amp. The Marinco brass power connectors have a lot of attack and clarity, but can have a tendancy to sound harsh/sterile/solid-state. If you like the attack/clarity/punch, but want to back off on the harsh/sterile character and provide a more refined sound, then upgrade the DH Labs cable with Rhodium plated FI-15 Plus. If the attack/clarity is way too much and is too forward and "in your face", then go for Gold plated FI-15 Plus connectors. The gold-plated will sound warmer and it will definitely be more laid back. Make sure you get the FI-15 "Plus" connectors (not the old FI-15e).