This really depends on the difficulty level, your social engineering choices, native lifeform abundance and current diplomatic relations.
On higher difficulty levels and with a decent police rating it would probably be better to build a defensive unit to keep the population content. If the base isn't in any particular danger make sure the defender doesn't cost too much because it will take ages to build it. Or a better option would be to build the garrison units at one of your main bases while the new base builds rec commons or recycling tanks depending on the difficulty level.
As for formers, have your main bases build some clean formers so that the new bases can develop their infrastructure quicker.
Energy banks and network nodes aren't a high priority in a new base because they generally don't produce much energy so the returns are low.
In summary: build clean formers, colony pods and defenders at your main bases. Build recycling tanks on lower difficulty levels and rec commons on higher difficulties. Then anything you want.
Sorry if this is a bit rambling but i should be revising for an exam! Anyway i suggest you read some posts by the resident strategic genius - Vel.
Hope this helps!