I have a G4 Quicksliver 733 and have upgraded the CPU with a Giga Designs 1.47 and also a Radeon 9000. I now want to upgrade the Hard drive to something fast but am unsure about all the options available. Is it worth getting a Sonnet Tempo Ultra ATA 133 PCI card? Will this make a new drive any faster? I have read somewhere that the fastest drives available top out at 41MB/sec. ATA/66 is rated at 66MB/sec. So switching to an ATA/100 or ATA/133 card won't make the drive go faster. I also need to know what the difference is between a Serial ATA Western Digital Caviar SE and an Enhanced IDE Western Digital Caviar SE? Will they both work with the Tempo card?