After looking things over, I think you'll want to consider using more than one antenna. Some of the major networks appear to be available only on Low-VHF channels.
KXLY - ABC is rebroadcast on real CH-5 from the Cashmere/Leavenworth area
KHQ - NBC is rebroadcast on real CH-3 from the Cashmere/Leavenworth area
The Denny Stacker lacks support for real CH-2 through CH-6. I'd go big, with a Winegard HD7084. It's L-VHF gain is needed in this case, pointed toward Cashmere/Leavenworth, 293° per a compass. Connect this antenna to the Low port of a H/LSJ
http://www.solidsignal.com/pview.asp...-%28zhlsj-1%29
The, point an Antennacraft Y5713 at 14° per a compass. Connect this antenna to the High port of the H/LSJ
Finally, face an Antennas Direct DB4e at 150°. Connect this antenna to the UHF port of a UHF/VHF signal combiner. Connect the output of the H/LSJ to the VHF port of the UHF/VHF signal combiner (Radio Shack or Antennas Direct
http://www.amazon.com/Antennas-Direc.../dp/B008PBTPN4
The output of the UHF/VHF combiner feeds the TV(s).
For a single TV installation, try this with no amplifier...
http://forum.tvfool.com/showthread.php?t=13646