I'm quite big into gaming especially the competitive side, My team just finished 2nd in SA for the first leg of the Do Gaming Competition for BF3.
If I were you I would stay away from phoenix-tech. Slow and unreliable. They lie about stock sometimes as well. +1 for Rebeltech.
If you want to get a pre built pc go for
www.evetech.co.za their prices really aren't that bad.
If you have any questions be it with parts or peripherals please don't hesitate to pm me. Don't waste money on inferior stuff like I have :nonono:
Ill be more than happy to give a guide line for what parts you should look at if you have a budget.
Also, I don't know if I can do this, pm me if you want Asus/MSI parts for your pc. I might be able to get a decent enough price for you.