Assalaam alaikum,
Here is a link with boths sides regarding music.
Islamtoday.com: Music – Opposing Arguments
Personally for me, I am most relaxed when listening to Nasheeds or recitations of the Quran.
Nasheeds without accompanying musical instruments are best.
Quran recitors,I prefer to listen to Mishary Al Afasy
www.Sabbir.com .I have many Surah's on mp3 and listen to them whenever I need to relax.The best part is that each time I listen I am learning some Surahs by heart.
Manof Allah,
always remember that every deed we do,whether good or bad is counted,which we will be recompensed for.Why not earn some good deeds while you relax.
Wa alaikum salaam