Regarding the protectors, I have a few concerns related to the Eve V's Screen.
As we all know, the Eve V's screen has an anti-glare coating. Someone from Eve (forgot who and in which post) mentioned that screens with this coating would result in more apparent scratches, i.e. the same degree of scratching is more visible than without the coating. Based on this fact, I would indeed opt for a protective film. Adding a protective film however seems to be contradictory to the existence of the anti-glare coating. As adding any protective films would cause more glare (light passing through two medium, each one of them reflecting some light, as explain by someone... sorry for the weasel words).
For the protective film to kind of make sense, it pretty much must be highly anti-glare on its own.
Complicating this more, the V is pretty much a digital pen device (at least all hyper early birdies get a pen for free), writing/drawing on a protective film... I'm not sure how that feels since I've never actually tried. My from my mom's experience with some maybe-not-so-good screen protectors, her iPad's screen protector has an apparent grid-like "worn-trace" caused by playing Candy Crush everyday. The screen protector itself wears out over time and heavy usage (solutions: buy new screen protector, or simply remove and wait for the device's EOL).
The protective film itself is technically a consumable, otherwise it's just like the screen and is at least at vulnerable as the screen itself.