Possible song choices

For this A level music project I am considering using an acoustic based song. this would simplify the amount of organisation that I would need to do and it also allows me to play around with the resources I already have. I could either do a solo performance or use a band, it is depending on which song I choose to use. my possible choices are Heartbeats by Jose Gonzalez, Cave by Mumford and Sons or The Sound of Silence by Simon and Garfunkal, the latter two require a band.