The ANT-751 is not a bad choice based on what your goals are.
I think you can do better without spending a lot though.
I'd suggest an Antennacraft Y5713, aimed at WTNH (197° compass). This would provide an ABC affiliate. Combine the signal with a 4-bay panel antenna such as the Antennas Direct DB-4, Antennacraft U4000, Channel Master CM-4221 or Winegard HD4400 aimed at about 105° compass.
Combining the two antennas is done with a
UVSJ.
The combination I propose will offer a lineup of ABC, NBC, CBS, FOX, PBS and CW affiliates. You might get an ION affiliate but only with the 4-bay outside of the attic I think.
You can try this in your attic but you may need to move one or both antennas out into the clear if your attic construction causes reception trouble.