Thanks for reading, yes it is stylish in a sense lol depends on individual taste I'm told that it comes in 2 colours, black & maroon 
you're comparing an ambidextrous with a righty mouse, both have different feel and handling. I'd probably favour the DA cause I'm not much in favour of ambi mice though. have you tried the feel of these 2 mouse? it's better to have a go at it before purchase

Is your DA still working? If yes, I would suggest you to keep it. Save the RM300 for something else. It is better than most of the mouse you've listed above.

Switch issue I guess. Could be accumulation of dust too. How old is the mouse?

Don't need to spend RM300. I would recommend the DA2013 since you're already using a DA, familiarity is there. The CM Storm Inferno is actually quite good as well, except for that laser sensor it has.

EDIT: Consider Corsair M65 White as well. Don't think they ar the available in Malaysia yet.

Try Mionix Naos. Budget price and ergonomically comfortable friend just bought one, replacing his Mamba