I recommend the 4560 eave mount , to get more distance between the top bracket and bottom long bracket to provide a more stable mounting for the mast pipe and the big antenna.
The Ronard antenna mounts are made of high quality thick steal and put together with real heavy duty nuts and bolts.
Antenna mounts are chosen by the requirements of the situation.
Type , antenna mounts , tv antenna mounts , antenna mounting and etc. in the google search box.
Here is another excellent antenna mount ,
http://www.palcoelectronics.com/pe300.aspx.
Or can use push up poles with guy wires.
More types and kinds of antenna mounts can be found at ,
http://www.3starinc.com.
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However many people now days make all their choices based on what it looks like.
Or how many positive reviews something has.
Or these words --> The most popular selling!!!
Or these words --> Sold more then brand X.