Amplifiers are appropriate tools for dealing with loss in cable and splitters down stream of the amplifier. They are often sold as a substitute for the correct antenna, not because it's the right solution, but because people erroneously think an amplifier will give them something for nothing. (“There's a sucker born every minute”, P.T. Barnum?)
You have no need of an amplifier, integral or separate. With the strong signal levels at your location, many amplifiers will overload and cause trouble. An amplifier driven into overload will distort and mix signals together. The output will be strong in level but extremely low in quality.
http://forum.tvfool.com/showthread.php?t=1514
The first of JC's links offer several suggestions for non-amplified indoor antennas. The suggestions are appropriate for your situation.