I am posting this comment with an Acer 11.6" netbook with an AMD dual core processor. It will do all the things you require quite easily. This netbook has been to New Zealand and various European countries and has worked without problems everywhere.
One suggestion I would make is that you ensure the netbook you buy has at least 4GB of RAM and runs a full version of windows. The cheaper versions generally only come with 1GB of RAM and don't run full versions of windows. If they do have a full version of windows with 1GB of RAM they will struggle to run the operating system.