Thanks for the response! I think after reading it, I had multiple main concerns! haha.
I would say that one would be being able to switch tones and effects from the floor and not having to press buttons on the amp. And my second was wondering what would be best to play live. So it looks like fbv might be the way to go with those in mind.
And a question to followup from your response...if I were to get the amplifi, does that basically render the Spider pointless?