We need to know what you are upgrading from and to.

Downloading the latest version using a download manager such as gwget or a
torrent will give you a disk which is current as of April, 2008. However, it
will still want to add patches and updates, unless you configure Synaptic to
only advise you of security updates. Otherwise it will plague you with possible
package updates that you may want to pass on, due to your connection.