Best results come with an outdoor mount. Considering the tree, a Winegard HD7694P would be a good choice. You should expect to see far more than the top six...
http://www.amazon.com/Winegard-HD769...ywords=hd7694p
http://www.amazon.com/1GHz-Single-F-...gronding+block
3starinc.com and solidsignal.com carry a variety of mounting hardware... eave and chimney mounting avoid the need to put holes in the roof.