I assume when you talk about SIP's you are referring to a wood skin sandwich. Wood sometimes can be challenging. Metal on the other hand could help reduce some the work you have to do. INP's are Insulated Panels made with metal. They are available on various thickness, more thickness the stronger they are and of course the insulation is better. Paint finish is also fabulous with also different finishes available by the paint.
Some oblivions places to use INP's would be the roof. With Insulated panels used on the roof, you have a whether proof roof within a few days. You can also get profiles that look like roof tiles. Another place for INP would be the floor, as again they are strong and contain insulation.
You can of course use Insulated Panels for the walls. Manufactures offer a great range of profiles and can also bend the panel for corners to make a smooth neat corner for the building. If you want to plaster board in side, then you can batten and plaster board if you wish.
Hope the above has been helpful.