Im a bit confused about what internal hard drive i can put in my g5 1.8. Can I use any ATA drive or do they have to be mac (g5) specific? I need the drive to be fast as I am using it mainly for audio so was hoping to stick to an internal drive instead of going firewire (I heard these sometimes had slower writing speeds than internall). Probably go for about 160GB. Any recommendations would be greatly appreciated, thanks for your time.