Nah, buy both and get a board bag! Proto for most of the day and Evo when you wanna up your flatland/jibbing game! (also apparently Evo is awesome on tree runs)
Where will you be going abroad? I will be going to Tignes or Ischgyl (however you spell it) and will be most likely be taking 3 boards.
And if you're a buy both kind of guy - you obviously have too much cash!!
...and a channel islands resident..... nuff said!!!