Pedigree Query

I bred this filly thinking she would be a good miler prospect with an eye towards synthetic or turf but that is just an uneducated guess. I am hoping someone can take a look and give me some thoughts. She is nicely balanced with a good hip but seemingly slow to mature- not very big and still growing into her very long legs so I do not plan on racing her until either late this fall or as a three year old. Her dam tends to put a good engine into her foals even if they do run at lower levels- not much else in this area to run at! Any opinions welcome and thank you! http://www.pedigreequery.com/sunshine+on+roses