And I would suggest you to do a 3 partitions.
First one for system ( / )
Second one for swap ( swap ) I found 1 GB to be more than enough on all systems (depends on what you do though)
Third one for home ( /home )
I don't know if the manual cover this, but you have to select "Something else"
This way, you can later reinstall your system without losing data in your home partition.