“Just so I dont have to keep changing lenses” you are writing.
But Dennis, this is exactly what you are asking, to give you advise to change your lenses into the new one 🙂
Just kidding. I think you know it yourself, there cannot be unique answer. Some people like zooms, some not. Some people like only small tiny lenses (it is what you have currently) and they do not like big heavy lenses (and in my opinion the new one is already on that big side). And and and. There is no way to get a good answer to your question.
Try it (or even a similar lens, like 18-55? or an another one. rent it for a day or two).
Have a nice day!
Source: Jonas Rask