Obj -> Marmoset engine (realtime)

Alot of the time they're alot more visible, but never the less =/. Its not just the engine, as I've seen other RT renders show the same.
This model is exported totally smoothed geo.aprox 180, no hard edges, no nothing. I've tried creating user normals and exporting them with "include user normals" ticked in the obj options but no luck.
Its not the normal map thats the problem. I can simply import the obj in say Maya, do a set to face normals and soften edges and volia! Once exported (obj) or viewed in maya it looks all good.
Now exporting as FBX does seem to fix this problem, while introducing another major problem...

Any object with mirrored UVs will have one side turn up like this (also happens in UDK). Theres a small hack you can do which involves triangulating and re-quadifying the mesh. On large models, this simply isnt an option.
I've tried ANYTHING I can think of. Freezing, deleting trash cluster, FBX/OBJ setting etc...
Could really use some help on this one, as I luv SI =D
-cheers guys
