Unless getting 2.5gbe or pci-e slot (since its also going fron gen2 6 lanes to gen3 8 lanes) its a bit of a meh upgrade overall.
Such a large price leap from 5000 to 6000 (especialy as most want a stack) that id want more than just higher passmark out of it.
Most wont even be near maxing the j5005 anyhow with the typical loads.
The ODROID H3+ seems to be a good deal with this CPU atm. It's $165 barebone (no ram, storage, case, or power supply). You can also buy their M.2 H3 Netcard to add 4 additional 2.5GbE for $47 for a total of 6 2.5GbE. But they are Realtek NICs though so probably better to virtualize for firewall installs.