Well, I've never heard of RAID (outside of the insect-killing variety), but I personally would reconsider the Gateway...my father works in IT, and he's told me on several occasions that anything recent made by Gateway isn't exactly fantastic. They're known to crash frequently and generally just function poorly. For a strong, high-quality laptop, I would suggest an Acer or HP or something like that.
And, out of curiosity, why would anyone want a function that has the word 'Redundant' in it, anyway? Isn't redundancy normally considered a bad thing?