I have done all rigid plumbing in the past and it conducts a lot more noise than including some vinyl tubing. It basically turned my entire enclosed wooden stand into a soundbox like a guitar or violin. It doesn't look nearly as tidy as your system but it is a ton quieter and allows for a lot more flexibility as far as fitting things into spaces. It's easy to go from vinyl to PVC and back and still allows for modular systems with valves to replace individual components. I solve the problem of water friction and reduced capacity by using larger diameter tubing and piping than the pump requires. You also get improved gph by avoiding all hard angles (which it looks like you have already done). For example, if the pump has 5/8" in and outputs I'll immediately convert to a 3/4" system before and after the pump so the pump is the bottleneck. Good luck!