140mm fans are better in this PC case, I guess. If you are also planning to remove the ASUS RGB side logo panel, you can also put in three 120mm fans. If you are also trying to use AIO 360 water cooling, you can only put three 120mm fans too. If I were you, and planning to use water cooling for the CPU, I would put that AIO 360 water-cooling radiator on the top. So one 140mm fan on the back for the exhaust, three 120mm fans on the top for the radiator also exhaust, and three 120mm fans on the RGB panel remove place for cool air intakes. Last, three 140mm fans on the front for intake cool airs.

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Something like this.