I've been experimenting with it a bit but if I change the FoV then the vertical placement is off. Just wondering what the best balance between the two options is.
best is MAX FOV even for campaign. and play with the crosshair offset until when you zoom in your reticle doesnt change position. but thats my opinion. theres no correct answer, sorry.
Pretty much, it's all about personal preference. I would totally suggest that FOV as well but the first person models look like shit to me. Until someone comes up with a way to move that around like in halo online I suggest lower. Not extremely low as 80 but not to the point where you can see the bottom of a weapon by looking down.