Which one is the LS-120?
The left.
now I would also like to buy a small hub 10/100/1000 to connect all the Amiga
I'd advise against using a hub. Back in the days of yore, it'd be great, but nowadays they really suck. This is becasue they slow down to the slowest connection on the block. So, if you plug in 15 100Mbps devices, and a single 10Mbps Ami, then everything slows to 10Mbps.
What you want is a switch (I use a D-Link DSS-8+) with eight ports. Judging from your collection there, it seems likely that at some point you'll be using high speed cable with a router (most DSL modems now have built-in routers), and having the extra switch for wired connections really helps. Also, a switch will automatically sense the type and speed of each connection to make sure all 10s run at 10 and 100s run at 100. No slowdowns.
Which will be handy if you connect any Macs or PCs to the network.
Just sayin'...
banzai