I want to buy some music on Itunes but have no idea which songs to buy! Help?

Adding to this I know what ones I like but I can't narrow it down enough! Heres a list of the songs I like

Matchbox 20 - Unwell
Still Alive by Lisa Miskovsky
Supercell / Ryo : 01. 君の知らない物語
Flyleaf- Cassie
Lovers and Liars - I'm Not Him
Lights - Quiet
Lights - Face Up
Santogold - You Will Find A Way
Sixx:A.M. - Life is Beautiful
Suzumiya Haruhi - God Knows
Set the Fire to the 3rd Bar-Snow patrol
Iris- goo goo dolls
Within Temptation - All i need
Skillet-Savior
Innerpartysystem - Redemption
The Fray - You Found Me
Weekend Warriors - A Change Of Pace
Tegan and Sara Nineteen, lyrics
The Killers - Mr Brightside
More Than It Seems-Kutless
The Devil Wears Prada- Louder Than Thunder
Dolores O'Riordan - when we were young
And many many many more I keep finding more x__x

Any ideas how I could squish this down a bit?