As far as build quality. I am not sure how you could say the q300 is lower quality. The welds are just as nice and it is the same grade SS? I feel they are both well made. The q300 will cost more, (includes mid pipe, polished, larger pipes, etc.) If you buy the NP mid pipe and y pipe when its released you will be close to the q300 cost anyways. Also my opinion though. To each his own.