20" or 22" Alloy Wheels?

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1987 FC3S RX-7 JDM
Hi There

I am picking up my Black 2013 CX-5 Maxx Sport this week here in OZ. And I am going to get bigger wheels as the std 17" on this model just wont do, just unsure on whether I should get 20" or 22".

Any Suggestions / preferences of those who have one or the other.

Have been considering TSW Donningtons or the similar Kahn version in Matte Black.
 
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