u mean Cat5?. Cat5E is better and more expensive
And any switch also will be enough i suppose
My 2 TH miner only uses at its peak like 16kbits. So even wireless B could work but then your issue with wireless comes to that wireless traffic runs like an ethernet network with a hub and you will have collisions that will cause good old latency.
Be careful with GIGABit switches each port may be capable of gigabit speed but not all of the ports can do gigabit at the same time. you want to look at the Switching Capacity for the switch it should be at least 2gbs per port on the switch. In the home environment this isn't to big of a deal but if you what to have a media server in your home and stream high quality videos it can make a big difference.
ok thanks!