You are so close in performance with the cartridges you have, when using the proper projectiles, with similar BCs, I would think you would be better off taking the money you would have spent, and upgrading what you already have.
Most guys I know have numerous rifles that are "almost" what they really want. I normally advise them to consolidate the bunch of "almost" rifles, and get one or two that are "Exactly" what they want.
That might mean a McMillan stock, Nightforce, whatevertype upgrade on a certain rifle. Most guys grab the same rifle every time anyways, so you might as well grab your "exactly what I want" rifle instead of fiddling with the ones that you are not really satisfied with.
