Bro.. U seem to care about camera and lag free phone.. Why not the lumia 930? Or if u insist want an android, I'd recommend LG G3. Both phones got ois and their prices are below 2k.

In my own experience, Moto X/G or Every Moto devices from 2013, Nexus series, HTC One M7/M8 won't have lag for long term usage. Or almost possibly not to have this issue.

Samsung phones on the other hand, I cant guarantee it. The skin is too heavyyyyy.

I wanted to try iphone for the first time too. But like some have said, I am currently waiting for the "s" series. It's evident actually. The first original model will have issues, since the iphone 4.

I'd look for 5S if can't wait to try iOS tho.

Think about not buying before but eventually the living condition at my new work place leads me to conclude I must need a more advance gadget. The sole reason I pick iphone in the 1st place is I believe it can last me 4 to 7 yrs like my old phone does. And I only will accept the monthly installment purchase option if it is interest free. But now due to no shop has available stock I have get myself a Sony Xperia Z3 with cash. So my problem considered solved. Thanks for your suggestion. 

At other month I would have purchase via Apple Store online, always got stock and delivered to your door step. The only draw back is need one lump sum payment, unless u have the Public Bank credit card then you can convert it into 12 months installment interest free without any handling fee. Sigh I do not have this bank credit card.

If you want to wait for shop, I can say is crazy waiting time. The queue is so long that I immediately forget about getting it from shop. The only available stock is 16GB Gold color version, which I cannot accept.