Getting ready to buy my first Mojo, but I'm a little unsure as to what size to get. I feel that I'm pretty much right on the line between the small and the medium since I'm 5'7" and don't want a bike that feels too small or too big. No bike shops around where I live have the Mojo, so I'm hoping that someone could give me a little help. In most bike brands I ride a small, the last bike I had was a Transition Covert V2, but looking at the geometry on Ibis' website their frames seem to run a little smaller than the covert (which I was pretty comfortable on). I'm a pretty aggressive trail rider so I want to be sure the bike will still feel nimble and comfortable.