The one I included in the build above is very good. I'd go for the EVGA 550W G2 or the one included above the Corsair RMx 550W. Just go for whichever is cheaper when you buy your parts, the pricing tends to change a bit due to promos. Costs a little more but is much better quality. It also has a much longer warranty.

You wont need a wired network adaptor. You will only need the wireless adaptor if you plan on using wireless and not wired. Ive never used wireless for my pc as generally it is slower and may not be as consistent as a wired connection so im not so knowledgeable about wireless network adaptors. Generally, a PCI-Express one is better than a usb one though.