I bought the 2011 13" i5 256 for my home office, it hooks up to a 27" ACD 20% of the time. I always buy top of the line, had the i7 first, returned it for the i5. I felt the i7 ran 5-10 degree's warmer and went to the i5 to hopefully maximize battery life and have less heat and fan noise. (Since then the heat / fan noise threads have just about disappeared so people are obviously happy with either the i5 or i7). Also bought the 11" i5 for travel. Couldn't decide, bought both, use both everyday all day ... Mac Pro in my office collects dust.