I definitely need more than 100A. I don't need 200A, but for convenience i might as well get it. I do have central air, electric oven, electric fireplace, etc. If i use the fireplace, i can't use the Nvidia GPUs in the 3770K box. If my wife irons her work clothes in the bedroom, i have to turn off the electric heater there or a fuse blows. The main reason i want 200A is because all my standard circuits are 15A and need to be 20A. The extra fuse slots in the higher amp mains would allow for more dedicated outlets. Every time i look at an outlet in my house this feeling of restriction always comes over me