my take on this is this: go on = emphasis on where go for = emphasis on my choice where
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Inchoateknowledgemy take on this is this:Yes, "to go for" can carry the meaning of "opt" or "choose" [of all the colors presented, we went for the more conservative]. In this case, however, I think "for" is about the same as "on".
go on = emphasis on where
go for = emphasis on my choice where