I chose the PIG after quite a bit of experience with other systems. I started with a PACA vest with the old velcro snap configuration. When that expired we went with HSGI Wassatch which is good, just over kill for my/our needs.

I did a lot of research and got the PIG. It rides high like a plate carrier should and is comfortable. In fact I have been able to reconfigure my belt by taking my holster off of the thigh rig. I could wear it with my duty belt without it conflicting. It is easy to put on quickly, unlike some of the other armor I have been issued/worn. I have not found a downside to the PIG yet. Plus SKD is great to deal with.

I use an ATS mag pouch, don't remember the model, that holds 3 ar mags and 3 Glock mags piggy backed. And then various other pouches for other things, like DD's, lights IFAK and so forth.