Now, as you may know due to market conditions NEO is lower than 50$ (which is a steal imo).
So the question is:
Would you invest the full 1k in NEX or split some of that money into (more) NEO. ICO seems to be very popular(given City of zion is behind it and their relation to the NEO project) and they re looking to raise "just" 25m which for a 2018 ICO is really nothing so given the hard cap of 1k$ per person to invest I could see why this could be worth much more in the future.
Congrats!
Use the $1K now and buy NEO, then use NEO when the ICO is on...buying as much NEX as you are allowed.