Alright, so I figured I'd pass this info along. It looks like Castrol Transmax Automatic/CVT Universal is a good full synthetic that doesn't deviate from Dexron III specs too much. It's also a couple bucks extra than the standard Dex/Merc at 22 dollars for a gallon, so pretty decently priced at Walmart.
Dexron III Spec:
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Castrol Synthetic Fluid:
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Thanks for all the info guys. I'm probably going to swap out the current fluid at 15k since it's going to shear down a fair bit by then and then put some of this stuff in and hopefully it'll be shifting buttery smooth.