Best iPhone5s carrier plan for me?

It can be a plan or monthly, but I was thinking just a 16GB iPhone. I text a lot but maybe a few calls here and there. Pretty good speed. I will have like twitter, instagram., snap-chat, and a few games.
I've been really lost with all the carriers. I want a pretty decent price, the cheapest would be nice.
My mom also has an Iphone5s and has Cricket and I though I could make a bundle and piggyback a phone to her plan and make things cheaper, well cricket won't accept that at all. And by the way, i don't like there standards anyways, but I don't know what to do.

Verizon which would be like $80-$100 a month.

Verizon would be best for speeds, reliability, and coverage areas but AT&T has some good offers out that are cheep to.