For connecting a 2013 Air to one possibly two TBD's does the processor play an important role? What processor should I have, i5 or i7? If the i5 can power them without problems great because I'm concerned if I keep the i7 I'm going to get more heat and fan noise. That's been my experience with my previous Airs. I'm waiting for the new (hopefully retina) 27" displays and don't to want buy a second display now to just to test out my Air... Anyone have experience using an i5 or i7 running one or two displays for long periods of time? Do you get lag, excessive fan noise, heat?