I currently have a Stripped RAID setup with dual 160GB. However, I am looking into getting bigger internal HDs. Do you know if there is a limit for the size of the HDs for my PowerMac G5? Or is this determined by the Operating System? PowerMac G5 PPC Dual 1.8 GHz, 6 GB RAM Mac OS X 10.4.11 (looking to upgrade to 10.5 soon) Thanks!