So I am looking to build a new rig with a massive amount of storage with some redundancy. I preferably want ~2gb of storage, mostly for digital media. I am looking at doing either a 4 port card with 4x750gb seagate 7200.10 would give me 2.25tb or an 8 port card with 5x500gb 7200.10 would give me 2tb, correct? I am leaning towards the 500gb drives since they are now below $150 and the 750s are still around $300. I don't have a set budget, but the cheaper the better of course. Can anyone point me towards some raid card model/brands to look at? Looks like ebay is the cheapest for the cards. My friend told me to look at at the Highpoints. How big of a difference am I going to see with PCIe 1x vs 4x? Everything will be local for right now, but may be streamed in the future. What the hell is XOR? Comments / suggestions?