I'm about to purchase a new iMac and can choose between an i5 or i7. Which is best for Arma 3? I've read that in some cases the i7 can actually cause the frame rate to DROP in some games. I plan to max out the Graphics chip (NVIDIA GeForce GTX 780M 4GB GDDR5) and run the game in Boot Camp. I'm leaning toward the i7 to help future proof my decision. Cost is not an issue. Thanks!