Dex is a great choice. It gives you a lot more developer options than the Cex firmware does. DEX is mainly about having more of an option within everything that you do, and lucky for you ITA is actually considered the best one at this point. Hopefully you have little knowledge about the console because with DEX, you can use Debugged EBOOTS in order to modify games via Target Manager. Now I will tell you that the complexity of dex is a bit more than cex but i'm sure it's nothing more than you can handle. The best thing about Target Manger is the eliteness that it holds. Some things can only be done using Target Manager and that's the great thing because with DEX you can use Target Manager and Control Console. But with cex you can't use Target Manager, so that's an automatic one-up.
I could go on all day about how DEX is a better option for you, but surely by now you get the just of the point i'm trying to bring across. Just fiddle around with the options and stuff and you'll easily figure out how everything works. Trust me. If you need anything else regarding your system then you can shoot me a Private Message or quote me.