Drupal 7: Webform Emails: How to change content based on a condition?
I reckon you can get there just using Webform and applying some Conditions. Here is the recipe I just tested.


Add a 'country' select field, with options NZ and USA 
Add a 'usa1' textfield, set as private, and enter default value you want to go in your email when USA is chosen ('love usa'). 
Ditto for an NZ textfield (nz1) ('go nz').
Now set up a condition that will 'show' (to admins only as it is private) the USA text field when USA is chosen as country, 
ditto a condition so if NZ is chosen, the NZ text fields 'shows'.
Now set up your email with eg [submission:values:usa1][submission:values:nz1]


and presto hey!

If i select USA as country I get email saying 'love usa'.
if i chose NZ I get 'go nz'

Is that pretty much what you need?

NB: I thought this route would work as we had done similar when we needed an email to go out to addressX 'only' if a user chose USA as country. 
We used webform conditions and 
We craeted an email field that was set to private. Then used conditions to 'show' it (to admin only) if USA was chosen.
Then we could just set up a new webform email using that field, and it only fired if the condition was met.