Recently I downloaded Ubuntu 9.04-64 bit edition from the torrent site. It really works good. I want to share the torrent link with you. If you install this in ext4 format, It will be faster than the operating system that is installed by ext3 format file system. It boots in 21.3 seconds approaxmately as per the latest Ubuntu forum which sounds great now. It will be able to handle fastly files which is upto 16 terabytes.
Find the link & download the latest edtion with 64 bit of Ubuntu.