What wheels and tires?

I have a 2012 RZR 4 800 with the stock wheels and tires (Maxxis Bighorn).

Front AT26X9R12
Rear AT26X12R12

I would like to get the same size wheels and tires for both the front and back to give it a more level look instead of the rear being higher. I ride mostly on rock, mud, and hard packed dirt.

Would this require spacers or any extra hardware?

Any suggestions or help would be appreciated.

Thanks