I've owned a MES unit and was not impressed with it. BUT I am a long time charcoal/stick type, and the electric just took all the fun out of Qing. While it's convenient, easy to use and can put out some tasty food, it just doesn't satisfy the caveman in me. There is something about building the fire and tending it that soothes my neanderthal soul. I just didn't get that with an electric unit.
Don't get me wrong, the electric produced some great food but it just didn't feel right. I realize that people are busy now-a-days and they want quick and convenient. If that's your life style then an electric will do you well and the MES is a fine purchase.
I just wanted to throw my perspective out for you to consider. Obviously, you know your husband better than me, so ask yourself what kind of guy is he? Does he want to mess around with all that wood and charcoal or would he be content to set the temp and throw meat on a grill? For what you'll pay for a MES you can buy a
WSM. Both are great cookers.
Whatever your choice, I hope you and yours enjoy it and have many great meals from it.