Like I suggested, its either now or never (year end).

The launching of GST next month will jack up the price. Not to forget the ever increasing USD to MYR exchange rate, things don't seem to getting cheaper in near future.

The only reason to hold on the purchase of 970 is speculating how powerful and what price will AMD's R9 390(x) be, which may or may not affect the price of GTX970. But again since your current card is already faulty, I doubt you can wait for that long (earliest is after June).

As for models, we usually don't recommend any particular brands/models. The one with lower price and longer/better warranty usually get our votes.

Cheapest is Gainward reference card, priced at 1099-1149 (increasing soon) and go as MSI Golden limited edition which cost over 1.6k IINM. At that price point, might as well opt for 980...

If you are going only 1080p, just go for GTX970. You only go R9 290X if your monitor resolution is 1440p or higher. Change of power supply is required for R9 290X because GX 650W 1st gen isn't good.

Your psu should be fine, currently using 550w psu with Leadtek gtx 970.

Plus GTX 970 power requirement only 50w higher than GTX 560.

The GTX 970's performance is (even with that slower 0.5GB) similar or better than the R9 290X.

Price is also quite similar, I would go for GTX 970 any day over the R9 290X.

At 1440p or higher both won't be good performers either, I tried GTX 970 on 4K before and I don't see how far the R9 290X can stretch.

For those resolution or higher, it's GTX 980 at the least, or better still GTX 970 SLI.