I live in Santa Barbara, and the 91XG in my attic gets me solid reception on numerous digital stations from Los Angeles, 94 miles away. This is really pushing the limits of any antenna, and results at such a distance depend on terrain, weather, etc. I use with it an Antennas Direct PA-18 preamp and a cheap Radio Shack FM trap (discontinued but available on ebay), each of which adds about 10% signal strength.
I initially tried an Antennas Direct Clearstream 4, which got intermittent reception from a few LA stations depending on the weather. Now I realize that the Clearstream4 is a good antenna for its size, but 94 miles was just asking too much of it.
Note that very powerful antennas like the 91XG are highly directional, meaning they must be carefully pointed at the transmitters. Expect some trial and error to get the best reception.