That's really nice that you can add more RAM to it. I don't think that is possible with my MacBook Air, but that is ok. I have owned 2 desktops for many years. Loved the storage and processing speed for its time, however, I wanted to go a little streamlined and be able to travel with it if needed. My husband just purchased an iMac a few months ago. He loves it compared to his windows desktop. All sorts of trouble with it connecting to the internet, keyboard not working, etc. No trouble with his iMac at all!
PS....he has taken a few Apple iMac classes which helped him a lot. Not sure if you have an Apple Store close by, but it's worth going and checking it out.