Greetings all, I am in the market for a desktop as I am in need of more power to compute HD video that I take with my DSLR. I was thinking about getting a 21.5" but realized I cannot upgrade the internals. My thought was this: 1. purchase the lowest end model of 27" that is currently available 2. upgrade the RAM to 32gb 3. put in a new HD (not sure which to get fusion or SSD etc.) any advice on this? Any other suggestions are great! I get an apple education discount for being a teacher and with the $100 app card it makes it a better deal than refurbished. I could go used but am fearful of those selling fairly new iMacs. Thanks in advance!