I currently have Verizon Wireless for voice only cell access. I'm looking to get a BlackBerry then I can connect to my work server and personal email (I apologize I'm a newbie regarding BBs). Of course I've been told to go with an unlimited data plan so who should I go with?

Verizon - BB Unlimited Data Plan - $44.99 / month - Verizon said if I used my BB as a wireless modem with my laptop I would have to pay an additional $15 / month and seperate SMS text messaging fees.
Spring - BB Unlimited Data Plan - $39.99 / month- I was told by Sprint you can use the BB as a wireless modem connected to a laptop (and thats included in the data plan) in addition it includes unlimited SMS txt messaging.

In result, doesn't it make more sense to go with Sprint since its $5 cheaper a month and I can use the BB as a wireless modem and it includes unlimited SMS txt messaging?

Thanks for everyone help in advance!