If youre planning on adding your wife, one plan you would bennefit fom is the sprint everything employee refferal program. 119/mnth gets you 1600 anytime minutes between two lines, unlimited data, texting, nav, tv + the free any mobile any time perk. I just signed my parents up for it and so far they love it. If you would like the e-mail and pin to get onto the website, send me a PM and I can get it for you. You both are also eligible to become a sprint premier customer (full upgrade credit yearly) after 3 months of a good standing account.
All in all, it comes down to how satisfied you will be with either carrier. For the most part, sprint and verizon are the same (atleast are around my area). Either way, youll still end up with a TP2 in the end