Furutech hardly makes any silver plated models, but i do see the FI-48 Male comes in silver.
For "neutral" I would probably say Rhodium. The Furutech gold-plated is colored in the sense that it softens the highs and also slows the bass. Silver is also not neutral because it tends to push the upper mids and highs and sound bright with lack of bass.
I have found that Rhodium actually has better ultra-high frequency response and extension than silver. I read once that silver does not do a good job at dampening electrical resonance and that's why it sounds so bright. Because it's resonating, it cannot stabilize enough to provide clean very high frequencies.
For "neutral" I would probably say Rhodium. The Furutech gold-plated is colored in the sense that it softens the highs and also slows the bass. Silver is also not neutral because it tends to push the upper mids and highs and sound bright with lack of bass.
I have found that Rhodium actually has better ultra-high frequency response and extension than silver. I read once that silver does not do a good job at dampening electrical resonance and that's why it sounds so bright. Because it's resonating, it cannot stabilize enough to provide clean very high frequencies.