There is some general rule if you live west coast, your actuator goes on the east side to get all those low eastern birds.
And if you live on the east cost, put the actuator on the west side to easily swing down to those low western birds.
Well, that'd be a great rule 'cept for two things:
- what do you do in the middle of the country? (where is dividing line?)
- what do you do for far-eastern Atlantic birds, even if you live on the east coast?
(there are no really far-western satellites).
Clearly, the middle of the US is not the middle of the bird cluster (it's east a few states)
...unless you don't want the far-eastern, circular birds.
Kind of a personal choice & compromise you have to make.
Luckily, there is a solution: big ol' Horizon-to-Horizon mount for your BUD

That, or two BUDs, one with an actuator on each side.
iPhone 4