I am located in a small valley in southwestern oregon surrounded be 1200 ft hills on all sides. what type of antenna would be best for working dx.I currently am using a sirio 5/8 with ground plane. Have a ham4 rotor and a 36 ft power pole to mount a directional antenna on. The sirio works great in this little valley but altho i can hear dx i can't reach out to them. My radio is a Galaxy dx 2547 and a xforce 350 booster.My present antenna is about 22 ft off the ground. Any suggestions for a better antenna? I have a 11 meter moxom but i haven't put it up to try . I'm 75 and i'd like to get it right the first time.