SERO $30 to Family Plan?

[poopboypat]

Hello everybody, I have had the Original SERO plan from 2006. The one that did not include Texts. So now after adding unlimited Texts, Total Protection Plan, and a 25% employee discount my plan is about $54 a month. Now I am needing to add another line to my plan or get a new plan. My contract was up in 2008. And I am not apposed to going to another carrier, but would like to stay with sprint if I can.

What I need is:
at least 500 minutes
Unlimited Text
Unlimited Data
Ability to use "Smart phones and 4G"

Now I only need 2 lines, and I basically want the best deal, If I go the EPRP way, will I still get my 25% discount? Every time I go to add a line sprint tells me I need to change my plan. So, What is my best option, stay with sprint? Or is there a better plan out there somewhere?