Hello. I'll be buying an enduro hardtail frame and my height is about 5'7. The geometry spec of the medium one is (ST: 431, TT:570, Reach: 377.2) while the large is (ST: 460, TT: 580, Reach: 385.8). So what should I choose? The medium or the large? I'm aiming for the longer reach but how about the seat tube. Will it affect my pedaling or it doesn't matter? Thanks!