LED life is long, but some will died prematurely. Depends on your luck really.
Some brands needed to avoid like Corsair.
<<but any clue which is more durable?>>
Deck, Ducky, CM Storm. If your luck no good, then also LED will die. But still, these are the better keyboards.
<<and it is able to change by my self....if it is over warranty period?>>
Yup, you may change the LED by yourself. But if you do not have confidence, then find expert for this kind of service.
There is a case in the past, the owner of Ducky keyboard do it by himself, at the end, burnt the whole PCB.
<<anyone can recommend me better version of Filco?>>
Filco Majestouch 2 TKL series are the best.
There is a lot of variations of theme. Black case, pink case, and other case theme.
But the guts still the same. So, any1 will do.
Thanks for your precious thought...Guess my best beat is go with the one who offer longest warranty then...which i believe is Ducky who give 2 years warranty. Gotta get majestouch 2 TKL yellow version i guess =D