AM3359 GPMC and 8 bit Address operate at 1.8V Question

I may need to have the Sitara NVFLASH bus (8Bit Mux Address and Data GPMC interface) operate at an I/O voltage of 1.8V. The current designs, the interface operates at a 3.3V Voltage. Or use Voltage translators

 The reason for going with the 1.8V is that I will have another device (new device) connected to this interface which only operates at 1.8V while supporting the current NFLASH device (3.3V).

 I believe I have three choices:

 1)      Keep the Sitara GPMC operating at 3.3V and have a  bi direction and uni-direction translators from 3.3V to 1.8V to interface to the new bus device  

1. 1.8V new device side
2. 3.3V on Sitara side
3. Bidirectional translator for AD(7-0)
4. Unidirection translator for control: CS, WE,RD,ALE,WP etc.
5. Question: Suggestions on translator? – assume 50MHZ cycle times max

2)      Change the Sitara GPMC to operate at 1.8V which is compatible with new bus device and have a  bi direction and uni-direction translators from 1.8V to 3.3V for the current NFLASH device

1. 1.8V new device side
2. 3.3V on Sitara side
3. Bidirectional translator for AD(7-0)
4. Unidirection translator for control: CS, WE,RD,ALE,WP etc.
5. Question: Suggestions on translator? – assume 50MHZ cycle times

3)      Change the Sitara GPMC to operate at 1.8V which is compatible with new bus device and change the current NFLASH to a 1.8V

1. This would limit all I/O on the Sitara VDDSHV1 chain to be 1.8V (this is OK because Mostly GPMC)
2. I need to know if I should use VDIG 2 from the PMIC and how to power budget this voltage rail.

Please advise, best option