A:
No One Answer:
Make a spread sheet...
with two columns...
Then list the pros and cons in the rows.
put a column for notes, cost /time savings
One or two features may make the change worth it.
It also depends on your Carrier plan.. and how soon to upgrade.
Also Google for Review and Comparisons on line.
Alot out there.
Only you know your requirements. and that takes some digging.
Know one , Know one Else can TELL you.
Best Buy personnel are knowledgeable and are a good sourse of information to help you fill out your matrix.