Samsung Star's audio quality is quite good..Personally i'd prefer nokia over sony ericsson...Here are a few phones you should check out..
1) Nokia 5320 Xpress Music-----costs around 14,000
2) Nokia 5310 Xpress Music-----costs around 12,500
3) Nokia 5300 Xpress Music-----costs around 11,000
4) Samsung Star --------- costs around 15,000
5) Sony Ericsson W580i--------costs around 11,500