We went over this a million times already. The minimum is 158m, not 155m (because PS3 numbers are known and can't magically go over 90m like some of you are suggesting). The maximum is 162m not 160m. However 160m is unlikely due to Sony not officially disclosing 160m, Jim Ryan could have rounded up.
ZhugeEX an insider with actual sales numbers gave his own thoughts of 159.2m to 161.9m
My personal prediction for years is 159.Xm due to the above mentioned.
The OP's 160m would clearly surpass the PS2.
I predicted by the end of 2025.