[Edited after CCP diddled about with how remaps work]
The best thing to pick is probably the bonus remap. Bonus Remaps now work separately from the standard ones so it can just sit there for years if you like. If at some stage you sell the character it will add value. It could also be valuable for an area of study like Drones (MEM/PER) which don't really match any other skill groups.
If you don't need a neural remap, and are pretty sure you will never ever need one, pick the Aurum so long as you already have the 5500 free AU they've handed out over the last 6 months.
Aurums are quite a cunning choice. Analysis of the clothing market suggests that price tanks for anything that falls under the free AU threshhold (currently 5500). If you take your AU to 7500 and they introduce new stuff or give us more AU you will have access to things only a tiny handful of players can buy. That increases the value of your Aurum, not just the 2k you get as a Christmas present but all the other aurum too.
In other words it's very significant being 2k in front of the pack.
Suppose CCP give everyone 2000 AU at some future point. Going by the figures from this analysis, it would mean everyone else is able to cash in their AU for around 20 000 isk but you can cash in 9000 AU for 66k isk each by selling a Field Marshall Coat for 600k isk.
So you could pick random Christmas gift worth 60m + sell 7k aurum at 20k isk each for a total of 200m
Or you could sell a coat for 600m (slightly less perhaps as a few other will also pick AU as their gift diluting the market).
Still as CCP add more stuff to the store and particularly when DUST launches giving us a new market of players and a load of new stuff anything in the cash shop that is out of reach of the people who just accumulate the free points will sell at premium prices.