Hi i use the Icom-AH7000 its 12 metres high never had a problem with it in 15 years my area is flat and we get winds exceed 120kmh and performance on vhf/uhf is excellent it does cost more than other discones but u get 50 feet of 5D-2V low loss coax cable and 2 N type connectors soen retailers will still have stock otherwise its replaced by the Icom-AH8000
Regards Lino.