For the past several seasons, we've made an attempt to rank the incoming classes for teams across the nation. The task is never easy, and this year is no exception. For the schools, investing in athletes today is a bit like investing in the stock (or precious metals) market. With recruiting taking place earlier and earlier, coaches have to become experts at detecting the traits, abilities and characteristics that will produce a championship athlete two, three, and four years down the road (or six, seven and eight by the time they are college seniors!). So who's class is rated to…