Once you get some time and more experience on her, she will tell you her limits. With more experience it will become obvious.
As you know the Great Lakes can become quite challenging, and the changes often happen very quickly. Of course the opposite is also true, when its blowing like stink and the seas are high, it can go back to flat as a pancake in a matter of hours. So, with proper weather forecasting and monitoring, you should be able to handle and stay clear of most situations. If its too rough out there, wait a day or so and you window should open.
In our area, we have some very nice inland lakes that are connected to Lake Michigan via a short channel. These make excellent opportunities for your type of boat. Sail inshore when the Big lake is rough, than when the conditions are right, head out to the big water. Its like have the best of both world's. Places like Muskegon Lake, White Lake, Lake Macatawa would be a great place to have your 25 footer. BtW, where are you located? You say the Great Lakes, but that cover a lot of territory.