Our typical computer use and needs: My wife is a graphic designer and works primarily from Photoshop CS5. She's wanting to keep her files on a network drive so she can access files from work and co-workers can get access. I average 2-3k photos a month and primarily use lightroom3 for my work, and sometimes use photoshop. I'd like to also be able to work from the NAS RAID drive for data safety. I have a large collection of DVDs and I wouldn't mind putting them on the drive but it's not a priority. We both work from MBPs but I am about to order a new iMac. I want to keep it simple, and EASY to recover data if a HD fails. So I'm assuming that using RAID 1 is my best option? I was looking at a 4 drive system. Would I be able to use the 4 drives as two RAID 1 configurations? I'd like to keep the total price to under $1000.00 if possible. With our needs, is there a NAS RAID drive that will work for us? Which is the best?