in my opinion,

u can get 5610 if u prefer to use it to listen to songs more than taking pic.... if u usually use ur hp to take pic, den can consider abt k810.... if u r asking my opinion, i would suggest u to buy k810...

reason
1) a great hp wit great cam
2) cheaper than 5610 (around rm200)
3) produce an above average quality of musics when u listen it using hpm-70(as i m using it now )
4) more user friendly, u can aso find games, themes n songs easily

above jus my opinion....