Golden Greetings
I would favor planed, for the reasons above plus rough timber absorbs a heck of alot more stain and more difficult to prepare and paint in rough form.
The timbers are a dust magnet and your wife or customer will appreciate it. Just take a vacuum dust bag, pour some on a sample timber rough then planed and try to clear it off each...
I think you will know your answer.
Cheers
alpmeadow
