I would go upto the 250, not much difference in casting and it will help get the fly down better. I have the SA line on right now and it cast good, but I am not so sure about the durability of it. Even though I am not the biggest fan of Orvis, their sinking line is good/great, it is durable and cast well in cold and warm water. If you are going to fish around structure you want durability to be your first priority. If you are going to fish for hybrids on the lake then the SA line will cast longer and smoother. Only my thoughts and opinions.
Icthus