I am going to post a thread where I have answered the same questions from a fellow in your area: what I have told him wiill apply to you just as it did to him: Read the thread and get back to me if you have any questions.
http://www.hdtvantennalabs.com/forum...-t1092-10.html
The XG-91 is available cheaply from Solidsignal.com for $53.00 plus $7.95 shipping: the lowest price that I've seen for an XG-91