That's a very long time! How come you weren't interested no more?
On-topic: It's a hard choice, and I bet OR/AS are amazing games (haven't played them yet, i'm European), but I think X and Y are a better set of games to re-introduce you into the world of Pokémon.
ORAS is a remake, and since your last game was Emerald, it means that the latter wil not be an actual new experience for you. X and Y are a whole new experience, since it has a new region, new Pokémon and overall new characters you haven't seen before, whereas OR/AS have aspects that are familiar to you.
So all in all, go for X and Y. You can buy OR/AS later, but X/Y is such a new fresh to the series, you just have to play it. X/Y will probably be better introducing you to new features brought in Gen VI than OR/AS would do.