If you want boots, look at the Nike Special Field Boots. Didn't bring them on I Day but I do a lot of rucking and E Course/O Course stuff. They are more comfortable, lighter weight, and feels like a shoe when running.
Second (or third) the running store. Ask your HS's Track and/or Cross Country coaches for recommendations on where to shop. My DS runs XC and the staff at our local running store was extremely knowledgeable. Shoes actually were NOT any more expensive than the big box stores.
