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You have a 3rd generation. Notice at the top of this forum it says "RX - 2nd Gen (2004-2009)" which would mean this isn't the right forum for your 2013 RX. We have a completely different vehicle that probably does best with different tires than your RX.
I am using a set of michelin crossclimates and find them excellent in every condition, even on snow ( they are not winter tyres but perform very well !) .