If I'm reading this correctly you don't yet have plates? Do you at least know specifically what plates you're going to get?
Some things fit certain types of plates better than others, some plates have proprietary carriers and some plates don't really fit anything well. Figure out what plates you want/need, what you need to accomplish with this system (and make no mistake, it should be thought of as a system as everything interacts with everything else) and what you're willing to spend.
Wearing a plate carrier without plates is a non-starter.
Ek
Some things fit certain types of plates better than others, some plates have proprietary carriers and some plates don't really fit anything well. Figure out what plates you want/need, what you need to accomplish with this system (and make no mistake, it should be thought of as a system as everything interacts with everything else) and what you're willing to spend.
Wearing a plate carrier without plates is a non-starter.
Ek