I forgot to add, the Motherboard (mobo) I got came with a Gigabit LAN adapter and sound card built in.
Sound and Network both worked ace on it!
It looks like we can help you select your components if you have a price range in mind and want to self build ^_^
Network Adaptor (get it on the mobo!)
Sound (get it on the mobo unless you are some sound fiend!)
(assuming you already have a monitor\keyboard\mouse)