Hi, i am putting together a nice water cooling system together for my new system. I have all the parts, a danner 700 gph pump that i have sealed up like on procooling.com(awsome pump), black ice radiator, new style maze 2 waterblock, and a resivoir that i made from those underground electrical boxes. I have also decided to go 1/2" for the entire system. I know all the different fitting peices that i need(ie the thread to barb adapters and such), but i dont know which material i should get. Is it all pretty much the same, or is there a best one. I have it down to nylon, polypropleyn(something like that), and brass. I would prefer the plastics over brass because they are cheaper, and better resistant to corrosion and chemicals, but i am not sure. Any input would be great, thanks