Buying a commercially-made table will get you going quickly, but it's also a good learning experience to build your own. (You might still want to use the Incra system for the fence.)
I'd suggest thinking about what you want to do on the table first. If the objective is to make small boxes, edge-form stock for projects, and the like, a small-medium-sized router may be sufficient. If, however, you plan to do a lot of raised panel doors with large-diameter bits, a variable-speed 3 1/4hp router is the norm. In that case, a lift may be convenient. Otherwise, it's really optional.