My advice depends on why you want to build your own. If what you want is a quality bike that fits you and at a reasonable cost, then spend 1/10th of the time you would spend on research, purchasing and building (assembling) and test drive several ready built bikes at your local bike shops, and then buy one there. If what you want is to enjoy the process and rolling up your sleeves for the research, purchasing and building, then knock yourself out and build your own as long as you understand going in that BYO will likely cost more, take more time, and possibly not fit as well as something you tested. Good luck!