Paintball is paintball. I'm not sure what you're looking for.
All markers shoot the same distance and velocity, have the same accuracy etc, etc, etc. If the millitary had the ability to make firearms as small as paintball markers that were just as effective as what they currently use, they would.
I highly recommend a high quality mask; without one you're going to have a bad time.
There are no tactical pods. Pods are pods are pods....
the halo too is a fantastic, affordable hopper that will hold up to abuse.
There are vests where you can hold a tank along with pods on your back. I use a tank against my shoulder, so I don't really see a point in them. I have one i tried to use once for a scenario(to hold a radio and papers) but it didn't fit right and kept pulling up into my throat.
i use an old duffle bag to carry my gear to the field; works great.