Finally took the plunge and gotten myself a TP-Link WR1043ND.

Thanks to klseet, the firmware works like a charm.

No more problem using iDevices with the Wifi, previously need to reconnect every few minutes. I've tried all the wifi channels still same.

I am using the white color lucent BTU and 4 homeplugs.

There were some hiccups with the 4 homeplugs at first. i connect BTU to Homeplug on 2nd floor and TPLink on the ground floor. Then another set of homeplug from TPlink to PC in study room.

There were interference if i plug in all 4 homplugs and after i take out the Router to PC Homeplug the WAN light in TPLink is blinking normally, previously was blinking very fast like infinite loop.

So using the TPLink software, i separated the 4 homeplugs into 2 network groups, then been working normally since

Previously i can't ping the black router from my PC, always time out. Now with new TPLink everything works smoothly

And yes, forgot to mention IPTV works fine as well.