I can see you have no substance to defend yourself and uneducated.
Yep, I would suggest no to use RAID till you are experienced with it. Actually, most of the Desktop Users has no real reason to use it, they simply fall to the MOBO marketing features or if someone says it so.
Indeed. But what are you planning to do with that card? Only for Gaming? Well, I use ATI cards to cater by business requirements such as running multiple apps in Eyefinity mode (eliminates building lot of PCs), GPU encoding etc. Hardly any gaming on those pilot machines. We are still evaluating the performance of those machines by cramming up with lot of applications (Design, Modeling and Simulation), also in Virtualization and Vt-d modes because we will build more high end machines (20 or so) by picking up the best board which delivers the best results as the final platform.
I suggest you to have a look at Sapphire 6950 card as it supports 3D too (HD3D feature) plus it costs far less compared to GTX 580; speed is not every thing if one understands enough about CPU/GPU. Anyway, if you wish to choose such cards, make sure you check with the case, PSU and the CPU cooler. I pick coolers (from Thermalright, Prolimatech and Scythe) based on my custom configurations and desired cooling levels. Lastly, MSI products are not that bad as prejudiced and if you happen to consider ASUS then go for Deluxe if you plan for SLI/CFX. Else, Pro is more than sufficient (if you care for UEFI; booting speed). Good luck!