Are you a tech junkie and have at least 2 or computers that you work from? I love my iMac because it is and forces me to stay productive (or at least believe I am!). Since the El Capitan upgrade, the split screen capability is a life-saver for bookkeeping work!
my old school MacBook Pro is great for travel. Or if I’m getting some work done between waiting for dinner to finish.
I’s great to have more than one computer. It's also a burden trying saving the same project on two different computers simultaneously. What happens when you forget or don’t even have an extended hard drive?! This became so annoying!... Until I started to use Google Apps in my business.