is this a home shop or a and industrial shop, those piping systems are all comparable and extremely nice, however they all share the same problem, which is they are very pricey. I've used pex plumbing pipe for air and it works great, goes up to 1 inch and you can get it 20' lenghts as well as coiled in rolls. the coiled is not that great for exposed runs though as it is hard to straighten.