I fully endorse Thesis theme. When i first got it two years ago it was perfect for micro niche sites. Then i migrated to creating authority sites, and guess which theme worked perfectly for everything that i needed? I always go back to Thesis even when i consider other themes just because it's so customizable.

I strongly recommended, however, if you do decide to purchase that you get the lifetime unlimited domain package. They always update their stuff so it's always on par with every update from wordpress.

And yes, I do use Thesis for adsense, if that's ever a question (which is the point of this thread).