You are a linux user? or you are new to using linux? If you are new to using linux, I suggest you to use ubuntu 11.04. Ubuntu is the most popular linux distibution and have a lot of users around the world.
Ubuntu 11.04 also has a display interface which is very pretty and very easy to use for the newbie. If you previously were windows users, then you will not be too difficult to use ubuntu, because ubuntu has a view that is not too far away from windows.
Ubuntu has several advantages, such as the free and safe from viruses. Without using antivirus, your computer and your data will remain safe.
For those of you who like browsing, you can still use mozilla firefox in ubuntu. And for processing the data, you can use OpenOffice.
Another advantage of Ubuntu is, ubuntu have a lot of community in the world, so you will not be difficult to get help.