So I am debating between two external seagate go flex HD's and am wondering what to do. I already purchased a 1TB go flex 5200 rpm hdd for $75 but haven't opened it as I wanted to read some amazon reviews first. When I went to amazon, I realized that seagate 750gb go flex 7200 rpm hdd is selling for $70 and that had me confused. I plan on getting the FW 800 adapter and than the thunderbolt adapter when it is released (or possibly just waiting for the thunderbolt adapter). I guess i'm just wondering if the speed diff in HDD will be noticeable with either FW800 or TB. I'm hoping to use the HD for both as a backup of my documents & music; as well as storing movies on it to edit/watch. Movies can range from a 100-500mb (slideshows esque videos created or small skits in iMovie) to HD rips (2-6gigs??). thanks.