[guitarbill]

I have one of those. Finding the RAM is pretty easy, I'm running 16GiB of ECC RAM. Cheap, too, because DDR2 if I remember. You can put a NIC in the PCIe slot. The SATA ports are fine for spinning disks. You can use the drive bay which is also SATA.

Of course it always depends on the use-case, but for most people at home it's sufficient. I use it as a Minecraft and media server.