Ok, let's see if this is possible with RSForm! Pro...
I've created a form with the basic fields (name, e-mail, ...) and 1 dropdown field.
Now here's the catch :
dropdown has 4 items in it. Let's just call them item1, item2, item3, item4.

Per Item : there should be a different email layout/content send to the submitter AND also a the admin email should be send to different email. (the content of the admin e-mail is the same for all items)

So when submitter selects item1 in the form the flow should be
-> email layout 1 should be send to submitter and admin1 should receive a notification.
When submitter selects item2 -> email layout 2 should be send to submitter and admin2 should receive the notification...

etc...

Let me know
And thanks in advance !