Hello everyone, I have read through the posts on this forum numerous times about RAID and RAID configurations in my search for the perfect RAID solution for my setup and I'm looking for some more advice and experience from people who have used the various cards. So, what I currently have is a Mac Pro 2x2.8 Ghz, 6gigs memory, with a 1 Tb drive internal and a second 1.5 Tb drive backing that up with time machine. Attached to the mac pro via an eSATA card I am running 4, 1Tb drives operating in a RAID 1+0 configuration in a Venus T5 enclosure with a Sil 4726 hardware raid card inside it. I have a few (albeit possibly lame) gripes about this configuration. For one, the Venus Case is a loud bugger and I am not to found of large fan noises. Second I have over 6 Tb of purchased hard drive space and was looking to migrate this to a RAID 5 configuration. Currently all my drives are SATA drives and I don't think I will be affording SAS ones anytime soon. I don't know what the performance gain is, but I've been looking at putting 2 drives in the 2nd optical bay, getting rid of the Venus and migrating to an internal storage solution. I would have a separate system disk and then I will just run the other 5 drives in a RAID 5 config. After looking at all of the card options I've sort of settled on a few that are more or less in my price range: Rocketraid 3520, Rocketraid 4320, and the Caldigit raid card Can anyone give me some testimonials about the relative performance of these cards? Or for that matter how much better internal raid will be relative to using the external eSATA RAID box I have now (which btw doesn't do anything other than RAIDs 0,1,10) Thanks.