I don't have a lot of experience with inline pumps, but I've had almost every submersible over the years. For externals, I've only owned the Iwaki, and before that the Little Giant. The LG was OK, but it was pretty noisy, and was so hot to the touch that you couldn't rest a finger on it. That was normal. The Iwaki is cool to the touch, which surprised the heck out of me. I expected it to be at least, warm, but it isn't. It's also very much quieter. It's pricey, but you really do get what you pay for. I would recommend the Iwaki strongly. It's very quiet, and even though it moves more water than the Giant, it uses less amperage.