Don't need Premium.
For sure I will lose more than one account so the cheapest will be the best for me
From BF3 there was a bunch of expansion packs which were pretty bad like Closed Quarters. So I may cherry pick a map pack if it's worth the money and skip the others.
China Rising is including in every pre-order so we will not see any other expansion within the first 6 month of the game. Than let's see how the BF4 thing is going and worth the money.