Assuming the current wheels are in good condition, load up existing bike as you expect to this summer, do a few long rides and see how well everything functions. This is usually recommended regardless. If the wheels still look good, you should be fine for a week long tour. I don’t personally know anything about your wheels but others seem to think they are reasonably good. Reasonably good should get you through a week on pavement. After the week long tour you might have a better idea about how much and what kind of touring you might do in the future and will then be in a better position to determine how to spend your money.