This car is not hard on oil; big sump, low rpm V6, and UOAs on the 3.0 V6 generally show low wear metals, little shear and no fuel dilution. Any SN-rated 0W20 or 5W20 will work great. I'd stick with the 820S filter though, given the bypass location, efficiency and cost.
I'd by more concerned with servicing the transmission. At 4 years, it would be worth considering doing a drain/fill now, then again at 60K (along with a filter swap). Finding places that can service this transmission isn't easy. It seems that over half of the dealers have no clue what to actually do, what filter needs changed and the service interval on the fluid. The CVT in this car is awesome, but should something go wrong it's going to be $$difficult$$ to repair. Staying on top of the maintenance of it seems like a good thing to do. I honestly wouldn't worry about what motor oil to use.