Originally Posted by
motocory
Would the medium give me a bit more of an aggressive riding position since I'll likely need the seat a bit higher relative to the rest of the bike?
It could go either way. You may need a higher saddle position, but the handlebar should also be closer to you, because the effective top tube should be shorter. You can always change the stem also, to a higher, lower, shorter, longer one as needed. I'm also 6'0", and I was right between the M and L frame size. I bought my 2018 model in L, but I could have gone with either.