Hey ive searched through the many threads about external dvd burners and have decided on a Lacie. I have an iBook 12" 1.33ghz and am looking for the best external burner for the price. I'm seeing a huge increase in price if it comes with Toast. Whats the benefit? Do I need this? I pretty much just want to burn iDVD and maybe backup. Also, would anyone recommend a portable one over a desktop one. I dont plan on taking it with me often, but will a portable one be considerably smaller?