That many drives, you should be able to saturate a good part of a 10Gb link. The difference for streaming read/write loads (like copying movies..) is night and day vs 1Gbit. That is assuming you've got enough CPU to run ZFS that fast. That is part of the reasons I stick to linux MD/xfs. Every time I try to use ZFS I run out of CPU or RAM. Also, given that I want low idle power means I'm not willing to throw enough hardware at it to make ZFS run well.
CPU is never a real issue in my experience, even when using compression (lz4) on everything. I do run an 8-core machine, but it's only a Intel Avoton C2750 (ASRock C2750D4I is pretty cool motherboard board with 12 SATA ports built-in), but I do have 32Gb ECC RAM. 16 was probably enough, but I run other things on it in Docker (Plex media server etc). I installed a plain Ubuntu 16.04 with ZoL - and it has been rock-solid.
It'll saturate a 1Gb link, obviously. I've been eyeing 10Gb configurations for a while, that will be my next upgrade. I'd really like to stick with copper so I can wire the whole house for 10Gb and have some super fast X11 nodes, but we'll see.
BTW: I'm running 10GbaseT at my house, and every single foot of it is cheap cat5e. Its rock solid (yah I can monitor mangled packets drop rates on my switch). I've had a lot of people talk down copper 10G and tell me things like its not possible to use anything but cat6A or better. Which is a load of BS if your runs are well under the 200M that is possible with cat 6A. I think my switch actually says that that it supports runs of 45M on cat5E, which is probably still 2x the max run in my house.
Frankly, the asus XG-D2008 and a few Chinese x540 boards (~$100 for two ports)with cat5 cost less than some of the fancy home AP's and is well within the prices I paid for my first 1G hardware. Two workstations and a server should be less than $600.
Adding to this this, there is the Ubiquiti US-16-XG which also has a bunch of SFPs for under $600.
That many drives, you should be able to saturate a good part of a 10Gb link. The difference for streaming read/write loads (like copying movies..) is night and day vs 1Gbit. That is assuming you've got enough CPU to run ZFS that fast. That is part of the reasons I stick to linux MD/xfs. Every time I try to use ZFS I run out of CPU or RAM. Also, given that I want low idle power means I'm not willing to throw enough hardware at it to make ZFS run well.