Is there a noticeable difference in performance? Currently, the 2014 13" rPro with 256SSD/8G-RAM/i5 is going for 1527 w/tax where I live. This has the new Intel Iris Graphics. However, there is a refurbished October 2012 13" rPro with 128 SSD/8G-RAM/i5 that is goes for 1157. It has the Intel HD Graphics 5000. Obviously the difference is in Hard Drive Space and a new graphics card, but is the nearly 400 dollar difference worth it for a new model? I mean what programs would you have to use to really notice a difference between the two? Are the they same for the average user? Is there a big difference in programs like Final Cut? What about speed/processing? I am torn on which one to get. I have settled on the 13" size, but the 12' seems like a good deal. I'm just not sure if the extra 400 is worth it for the graphics/SSD. Help!