i noodled around on an idea i had.. the song idea can be listened here

http://www.youtube.com/watch?v=f4IH9FcAS8U&context=C35c6621ADOEgsToPDskJ1TtO8FH_KDkNf6iJW_C7B

NOw i wonder were i can go from there, chord wise? Id like to spice up and with usage of great sounding chords and to what chords will sound good ?..Id like more mysterious emotional chords..
Like what chord progression could be good ?..