Of course it's all about swing and practice practice practice!
But the Rogue X's are a very big iron. I bought one just to test out and hit around at the range, and wow it's huge. Abnormally so. The Rogue Pro is a more normal iron size.
The Callaway Apex is the perfect iron all around. I have the 16's but the 19's are good too. They are not bulky or chunky or overtly game-improvement in any way, but they are a very well built (Read: Forgiving) club. I will probably get a set of the 19's at some point now that the price is coming down (can be had for around $800 last I checked). The shape of the 19's is even sleeker and more aerodynamic and should satisfy discerning 'player's' eyes as far as a compact top-line.
The Mizunos are great as well, and as someone else said, you might not need the most 'forgiving' of the lineup (marketing). Go for build quality (forged).
These are 2 of the best irons on the market so you are looking in the right place. In my experience, American irons will have more tech (Read: springy face effect when hit properly) and the Japanese irons will be more traditional (a quality forging that will never under-perform).
If you are a very good golfer and have a very consistent swing, then of course getting a fitting is the only way to go. If you are inconsistent like most golfers, a fitting is still good but the results will be skewed as to how you are hitting that day, how your swing is changing from minute to minute, etc.
To summarize, just pick one! Both are great and will be an improvement over the bulky Rogue X's.