Finally, after three days of downloading, Slackware 11.0 ISOs are completely downloaded and tonight i will burn the last ISO. Indonesian mirrors are limited, so i had to use other public mirrors and it's quite fast. Since i have been using -current, then i don't need to upgrade at all. The ISO is just like a baseline for me when i want to have a fresh new system, so i don't have to install/upgrade a lot of applications.
Happy Slacking :)