Depending on how light or heavy a sleeper you are, night trains can be a mixed bag of pluses and minuses. You can arrive at your destination, bright and early, ready to go, or you can be worn out from stops throughout the night, with the train stopping and starting up again, possibly waking you up repeatedly throughout the process. At least you wouldn't be dealing with a border crossing, like we had 10 years ago going from Bulgaria to Romania!
This can have pluses and minuses, too (including having to get to the airport, deal with Security, etc.), but have you looked at possibly flying, using a cheap, quick flight on Vueling Air or other airline?
Last year, we did have to scan our luggage thru the x-ray machine before boarding trains in Spain, but it was much less hassle than airport security. Happy travels!