hey guys. i currently own 12" pb and is looking to upgrade to 15" because i do video work. the reason i want to upgrade is that 15" does have FW 800 AND FW 400 which i can plug in my ext hd (FW800/400) and camcorder into. But, i want to ask you guys that, if i do daisy chain camcorder and hard drive into the FW 400 port, could i be dropping a lot of frames? or, would it be perfectly fine to daisychain? please give me detailed answer asap because i am about to sell off my 12" pb!! thank you guys!