shot with a Nikon D60 and Sigma 70-200mm f/2.8 lens.
First photo is slightly cropped and seems "busy" to me.
Second photo is cropped fairly tight and seems to not show enough of the "where the horse is going next" action to me.
This was my first time shooting real action like this and I'm pretty pleased, learned a lot though. Fortunately for me, there was a commercial photographer there who talked with me during down times and gave me a lot of advice/general talk. I shot in shutter priority mode, but half the ring was shaded and I never adjusted and therefore I feel like my exposure was a bit off for different sides of the ring. Additionally, I start shooting earlier in the day and by the afternoon (when this was taken), the sun had changed enough to overexpose my photos like this . I never look at my screen or otherwise chimp and shots like this make me regret it.
Regarding editing, I'm fairly sure all I've done is sharpen it, which looks very off that this resolution. In any case, I'm open to a lot of suggestions regarding edits in photoshop.