Designer, thank you for your input. All comments welcome. Because of what you have said, along with others, I am leaning in favor of the 28 but I still want "lots" of input. ms6852, thank you for your comment. All are welcome. I am at a point where I can take my time; no hurry. The more I "hear" the better my decision will be. CHW2021, all input welcome; hadn't thought about tubes. Will throw that into the blender.