If I were you I would stay away from graphite. As a young adult, you are going to get more distance and power from steel shafts on your irons. Graphites aremore for women, young players, or seniors, as they are more slingshot... steel irons are more rigid. Yes it takes more head speed to get the same distance, butsteel will be more accurate.
CCI's have been amazing. My friend has the Nike Ignite irons, which are also a good set. Never used the the Sumo irons... I actually didn't know Nikemade Sumo irons.
I hear Cleveland has some amazing sets out too, but they tend to be a bit more pricey.
Also, if you have issues with chipping (my biggest problem area) you might want to invest in a 56 or 58 degree wedge. I found, even with my PW, I would top theball... the bigger degree utility wedges make it damn near impossible to top.
You give up distance, but just as a utility club, its a gosend when you are 30-40 yards from the green, rather than using a PW and shooting it 90 feet past thegreen.