with good sound, for sure is:
W995, aino[Clareen Gallery sells under 1k for both ori/ap]
not so sure about the sound qualities:
c905, hazel[new release]

CG's price:
hazel ori rm 730
aino ap rm 830 ori rm 990
w995 ap rm 790 ori rm 1000[few weeks ago...im sure w995 is more cheaper right now]

price reference[from this thread]:
AINO @ RM 1060 / RM 1190 (ORI)
HAZEL @ RM 700 / RM 780 (ORI)
W995 @ RM 880 / RM 1060 (ORI)
C905 @ RM 780 / RM 840 (ORI)

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Added on July 28, 2010, 9:53 am
BEYOND the XM [XpressMusic]
Nokia X2-new release, 5mp camera, bar...
Nokia X3-older than X2, 3.2mp, slider...
Nokia 5233-Nerfed down of 5230, 2mp, symbian os v9.4, just without GPS & 3G[if u wan touch screen experience]
Nokia 5230-Nerfed down of 5800, 2mp, symbian os v9.4, With GPS & 3G, so you wont get lost while u're intoxicated listening to musics 
all around 400-500
X3 @ RM 450 / RM 480 (ORI)
X2 @ RM400~450[according to mobile88.com]
5230 @ RM 480 / RM 510 ; RM 570 (NAVI) ; RM 630 (CWM) (ORI)
5233 @ RM 490 (ORI)
all of them support up to 16GB !