Alternatively, you could take a look at Sonore's 'System Optique', which puts an audiophile stamp on using a fibre optic isolator as a few people once did. Obviously this isolates from noise on the main network, the idea with this implementation that it doesn't re-inject noise at the ethernet/fibre or fibre/ethernet converter stage (especially if you use a decent LPSU).

Never listened to one, though, this is all in theory.

HC: 861v4/ID40/LPS, DSP5000, DSP5000VC, DSP3100, SW1600, HD621, Oppo BDP-105, Sony VPL-HW55ES
2-Channel: Oppo BDP-105, TEAC VRDS-7/Trichord Clock 3/PSU, 551, Quad 303, Harbeth Compact 7ES-3, Kimber cables, Russ Andrews mains and supports.
Previous Meridian: 5000C, 5200SL, 7200.2, 6000, 562V.2, 568.2mm, 800v4, 808.2i, 818v2/v3, 861v8, 502