Hi, need sifu advice on the phones below, I'm really torn between which one to choose.

My usage model:
1. Need dual sim & at least one sim with LTE/4G
2. Need good browsing speed (I use Chrome browser a lot)
3. I use Google Now, Google Map and Waze a lot
4. youtube, and social media (whatsapp, wechat, FB)
5. Hope the phone has potential upgrade to Android M or Lolipop 5.1.x
6. Good battery life
7. Budget below RM1.5k


I've narrowed down my choices to:
1. Samsung Galaxy S5 DUOs
2. LG G3 dual sim (model D858)
3. Asus Zenfone2 4G/64G or 4G/32G
Currently I'm using Redmi 2s, can't stand the 1GB ram, always stutter/lag when browsing. Battery life so so only.

Anyone knowledgeable about phone above mind to let me know the good /the bad?
If you have other alternative phone suggestions please recommend too.


Thanks!