is quickly climbing the ladder. The composite rankings are great (and free) and it's not like the other sites where they pretend Rivals and Scout don't exist. For strictly Michigan content, Sam Webb at Scout is probably the best 'insider'.
In all honesty, any good info makes its way over here quickly, make a donation to Beveled Guilt in the amount you were thinking of spending in a subsription.
Also, ESPN currently provides the most accurate rankings so keep that in mind.