I just replaced the internal HD on my ageing first gen alu iMac with an SSD and its blazing fast now. However, my iPhoto library is currently on a USB drive and performance of iPhoto has only improved marginally. Question is, if I was to replace the USB drive with a FW drive, will I see a marked improvement? I was thinking of either the G-Drive or WD Studio but I read that the WD only uses a 5400rpm drive which does make it a bit slower. Does anyone have experience with these or any other FW for iPhoto purposes?