Out of the Box, my M8 comes with 1.60.708.2.
I've been so upset that I can't go S-OFF with Firewater.
As for Sunshine method, in-app payment declined my credit cards (Myanmar).
And even with my Fav custom ROM, due to base OS difference, there were problems with boot time, boot logo, ...
Finally I found this site
[ROM] [JB] [V] [ALL BL] Sony Xperia Honami i1 Style for LT25 (i/C) | v1 | [Update: 20.8.2013]
Translated Source: http://goo.gl/5luidd
MEGA: LZ25I - uploading
Very fast and stable ROM - b