My buddy sku has compiled a list of Whiskey blogs - link
Perhaps you can find one there that meets your needs.
Finding a blog that "predicts" the next great bourbon may
leave you a bit disappointed. I imagine you'll find blogs that
do make predictions but I wouldn't base my purchases on
those guesses. Not that you can't find mention of some
tasty soon-to-hit-the-shelf bottles but if you're thinking
along the lines of an investment, I'd be very cautious.