Some thoughts:
1) The answer to "Do I need a truck?" is always yes, the only differences are in why
2) SUV vs Truck - I would think about how much you move big stuff - furniture, etc... If you are planning a move in the next year or so, are going to be buying appliances, heavy/large items - I'd lean toward the truck
3) Compare the interior room of the SUV and the Truck - odds are the SUV is going to have more interior space. Consider this along with your answer to #2
4) Is your use more "over the road" or "over the trail"? Over the Road leans SUV, Over the Trail to the Truck. In the SUV you have access to your stuff while driving (well, at least someone does)
5) Is this vehicle going to be modded (Cap, shelves, whatever)...not sure which brands you're looking at, but consider the availability of after-market parts if this is going to end up as a project vehicle
6) Consider 1-5, then go buy the truck. (just kidding, but that's what I did).
7) If going truck, then you have a lot more configurations to consider...to get exactly what you want, if you're going new - order it. Also you will need to consider whether you want a truck cap or not (that provides as much security as an SUV)
Hope that helps
EDIT (Sorry, forgot one)
8) If your wife wants the SUV, the buy the SUV....then buy the truck for yourself.