First off, I am in no particular rush and can wait out product updates and/or expected refreshes for either the iMac or MBP as necessary, but the end is nigh for my nearly 10 year old iMac which has been perfect in nearly every way for us. Any kind of catastrophic system failure obviously moves up our purchase timeline. The old iMac has been upgraded over the years with a 7200rpm 2TB internal HDD, 4GB RAM, and is backed up via a 4TB drive in a new OWC FW800 (and USB 3.0) enclosure. It’s running El Capitan right now which is the end of the line for OS upgrades for this machine. I’ve always had a main desktop pc dating back to my first Commodore so the thought of doing without one in the future feels alien, but at the same time is also feels like the way things are going in the future. Prior to the iMac had built a gaming pc which I kept running for 7 years, but I quickly tired of Windows OS, the constant crashing, OS reinstalls, driver problems, incompatible peripherals, etc, etc. Yuck. Prior to that I had a Power PC in college that I had bought in 1994. I loved that machine, and the Mac OS in general. We have a decently sized ecosystem of Apple products in our household. Besides our Dell (work) laptops we have iPads for the kids, a 2nd gen AppleTV, a pair of iPhones between us, retired iPhones that the kids use to watch loaded movies or netflix, a 6th gen iPod in my car, and the previously mentioned iMac. What do we do with the iMac? It mostly acts as a media center and file storage: iTunes fileserver, Youtube, misc. other videos, web surfing, Lightroom photo library (family snapshots). The only other software run on this machine with any regularity is iBank, Turbotax, and other minor 3rd party utility programs. No heavy duty computing or creating. We imported some video from our camcorder to make digital movies, but haven’t done anything like that in years. The thought of losing the big screen and ample speakers sounds like a painful proposition to me, but the alternative upside to a MBP is obviously its portability. Also obvious, is the fact that I can’t rely on anyone else to help answer my personal needs as to whether I should get another desktop or a new laptop. Would it be nice to get the Mac out of our home office? In some ways yes, but in other ways I’m indifferent or even hesitant. Before we plunk down $$$ on a new machine I want to consider the options thoroughly and hopefully receive some input from others as well, particularly from those who may have had to make a similar decision, how they evaluated their choices and whether they had any regrets (especially if you went from iMac to MBP!) Many thanks!