Well we need to know what else you are planning. For instance; are you planning on dual booting windows? Do you need 3d support? (playing linux games)
If you are not going to dual boot windows then you can just burn the ubuntu cd and basically allow ubuntu to use the entire harddrive and it will pretty much do the rest.
It's hard to say what you will need. From looking at the hardware in your sig I am betting that ubuntu will locate all of the devices and install the necessary packages to run it.
Post more info and you will be able to get more in-depth responses.
