Your motherboard link is broken, but I doubt you need a NIC, motherboards tend to include these.
Also, you would be buying a system that has been EOL for over a year. I would strongly suggest you look at AM3's and low power Athlon II X2 chips. It should cost about the same. Otherwise ask around about a dual core atom chipset/mobo combo. That would be cheaper, and I think it would be enough. Take a look:
EOL ("End Of Life")means not produced/supported any more. It may be harder to find drivers for these devices, especially as time goes on. Both the AMD and intel boards you linked are EOL.
I think the card reader would be bootable, since it's usb, but I'm not positive.
I woudn't buy a motherboard without gigabit lan and sata ports, if you want those. Many low cost solutions contain both (including the atom I linked) It gets to be expensive, and prematurely fills your pci slots.
This will save money, which you can use on a brand name PSU or upgrading your disk drives to: