1) strictly stay away from Nokia 5310 and 5610.
2) In SE, only one good phone's there for 10k: W580i
3) Check Nokia 5320. Great features and XpressMusic phone but it has average battery talktime of 3.5hrs.
I would pick Samsung i450.
S60 phone with superb music quality and dual slider design.
costs around 11k
Product page: *www.samsungmobile.com/promotion/yourmusic/i450/
This is one of the best sounding music phones in the market right now. Get Creative EP630 along with this phone
PS: I had real bad opinion on samsung phones till I found this phone.