10gigabit LAN capabilites, mainly because our computer network cards don't support that speed...
Your computers will need to support 10 gig too if you want 10 gig, will only go as fast as the slowest piece in the chain
I have netgear 24 port 10gig switch, bough a while back was pricey but I think prices are coming down on 10gig hardware.
Newer computers I use have 10 gig onboard, older ones are on gigabit but don't need 10 anyways.
I had to upgrade my NAS with a 10gig card. Since upgrading to 10 gig there is no difference between working on files locally or on the NAS