Go for condition 1. Get happy with your phone,

The nice video quality means? Good quality when play back or recording?

Video quality is depends on your video. Not the phone, of course you can choose, some phone has a limited 15fps playback but high bitrate like nokia. SE has a relative lower bitrate but support up to 30FPS. But symbian is the best , no problem with 500kbps and 30FPS.

For stylish phone I really got no idea cause all the phone looks same to me, specs is more important.

For me I will go for 6233 instead of 6300.
6233 is good in music playing. For the second hand , RM450-500 is the price. It shouldnt be more than that
For SE, go for k800/k810 for the performance, it will never fail you. The music quality with HPM70/82 is very good, I use it b4 and all I can say it is superb, no regrets. Not to forget 3.2megapix and xenon. If you wana compare with W series, the only drawback of k800/k810 is the music player isnt that advance, meaning it cant filter the songs by genre etc. Bass wise, with HPM70/82 and tweak the equalizer, u are ready to go.