When considering screencards, cheaper = better, because they're all 99% the same..
Just look at their warranty, I'd prefer a 2 or 3 year warranty if I were you, it gives you better 2nd hand value later on.
As per the components in my sig :
Most of my PC was built last December, but I have older parts too. (screen, one HDD)
Mobo - R3000
CPU - R2500
Screen - R3500 (18months ago)
Graphics - R2700
HDD's - R3500 odd (500GB and 1TB)
Ram - R1800
Mouse - R700
Keyboard - R600
Headset - R1400 (Razer Barracuda)
PSU + case - R1800 (Raidmax volcano + Aerocool Zero Degree - which I'm selling

)
Extras - R500 odd
So that'd be - R19.5k
You can build a similar system ATM for R13-14k.