What's up CM,
I would look towards option 3 or 4, strictly from a perspective of design and placement. Both are similar to other like-kind snorkles already on the market.
IMO, option 4 is the most direct route from where the exhaust currently exits the undercarriage. Further to answer your concerns for resale, it would be most familar to buyers as opposed to option 3 which cuts through the body enroute to the roof.
Either way, unless you get creative which would more than likely involve cutting into the body. I see the above mention options as the most direct solution to water, snow and slush this winter.
Hope this helps, good luck with your choice.
Regards.......8sm