I have to echo grunt's last post. You really are way overthinking this diet thing... Just eat a good selection of vegetables, a little fruit, then a ton of protein. I either count calories or at the very least count my grams of protein and then eat as much as I can on top of that. Total calorie amount and total amount of protein is going to be more important than what you are actually eating if you are trying to gain mass.
As grunt said earlier, flyes will not change the shape of your pecs. If you feel your inner pecs are too small, then you need to grow your pecs larger. I've noticed as mine grow larger than the inner part has started to fill out better, so I think you just need to be patient.