I recommend a Winegard HD7000R antenna aimed at 68 degrees magnetic compass. Yes it is true that attics are not the best places for Tv antennas , neither is the inside of a house. The Tv signals at your location are VERY STRONG , so the signals go through the wood and some of the brick. If the roof is not metal and there is not metal backed insulation on the underside of roof then the HD7000R should receive Ok in the attic. If there is metal duct work or foil wrapped duct work or heating and air conditioning units in the attic or on the roof then the antenna needs to be away from the metal units. No metal blocking the reception of the antenna in the direction of 68 degree magnetic compass. Here are places to buy Tv antennas and etc. ,
http://www.solidsignal.com ,
http://www.amazon.com ,
http://www.starkelectronic.com ,
http://www.3starinc.com