I'm trying to make a switch of hard drives in my g5 from an 80gb seagate to a 200gb hitachi. One is a serial ata and the other is a parallel. I'm wondering if it's good enough to get a converter or to just sell my recently purchased parallel and get a serial ata hard drive? Also, if a converter is the way to go, please direct me to some places to get reliable cables. Thanks in advance.