Thank you everyone for the responses.
To address a few questions/comments:
I am living in a single family residence (ranch home with attic) and plan on only having one TV connected. There are a couple of trees which may be troublesome for me, one of which is in my neighbor's yard.
Using the cheapo indoor/outdoor antenna I bought at monoprice.com is just not working for me. It is currently indoors and I am looking to once and for all solve the problems I've been having with it by replacing it with a high quality antenna, of which the suggestions for me have been unanimous.
The local CBS station is not too much of a concern for me, but obviously, the more stations I receive the better.
John, thank you for the useful information. This link
http://www.ronard.com/909911 seems to be broken.