You have fantastic (yet they will probalby take advantage of you) computer stores over there. jrunes once scanned the different flyers at what he called the hardware mega shopping centre. You might want to pm him and see if he has any advice. Tell him I sent you.
The best way to get a good deal is to learn as much as you can about the components you are seeking. Keep an open mind and have several alternatives that are acceptable when you go shopping. You also need to know which products to stay away from.
Next 50 days is a long time, especially considering the instability the Japanese earthquake is introducing to markets. I will just provide general suggestions:
CPU:
i5 2500k for $220. This is the standard for high end gaming, and is the current latest Sandybridge offering by Intel. You can save some money by purchasing a less powerful CPU in this series, but won't be able to overclock if you do.
Motherboard:
ASUS P8P67-M (REV 3.0) LGA 1155 Intel P67 for $110. You do not need a mATX board - I just selected this one because it is available. There are very few 1155 motherboards because there was a recall - prices are inflated and there are no discounts. Supply and selection should be increasing dramatically in the next couple of weeks. I am also expecting the price to drop. Things to look for are LGA 1155, P67 chipset (so you can overclock) and you only need one PCIe slot, so you should be able to get it for around $100.
RAM:
Patriot G Series ‘Sector 5’ Edition 4GB (2 x 2GB) for $35. You could also go with 8GB of RAM. Speed does not matter significantly 1333 or 1600 is just fine. You need to make sure you get dual channel memory, and it comes in even sets.
Video Card:
MSI N460GTX -M2D1GD5/OC GeForce GTX 460 (Fermi) 1GB for $160. Make sure you get a 1GB version of this board that is not an "SE" model. If you do not need an OS, then put your extra money here to get a 560Ti. I did not consider any AMD products here, but their GPU's are also very competitive.
Hard Drive:
SAMSUNG Spinpoint F3 HD103SJ 1TB for $65. Make sure it is a Spinpoint F3, and do not settle for any other Samsung product. You can save some money if you get a 500 GB version. Another choice, but probalby more expensive, is Western Digital, Caviar Black.
DVD:
ASUS Black 24X DVD+R 8X DVD+RW for $18. This part is as close to acommodity as any component. Buy the cheapest.
Case:
LIAN LI Lancool PC-K56W Black for $70. You can spend a lot less on cases, but the better the case the easier to build, and the longer it will last. Lian Li cases are almost always loved by their owners. Other good choices are Cooler Master and Antec. Rosewill is a Newegg brand that is good too.
Power Supply:
General Newegg serch for around $43. Do not be talked into any other brands, unless you can find some research on them first - chances are they are not quality products and may fry your other components when they go bad.
Heat Sink:
COOLER MASTER Hyper 212 Plus for $30. This is cheap, and effective, and should be available in your area.
Monitor:
Acer G215HAbd-1 Black 21.5" 5ms Widescreen LCD Monitor for $135. find something with 1920 X 1080 resolution. 23 inch for about the same price would be even better.
OS:
Microsoft Windows 7 Home Premium 64-bit for $100. Make sure you get the 64 bit version to accomodate more thatn 4GB of RAM.
The total here is $986. Wow, I spent your whole budget. remember - the parts you actually purchase, if you shop judiciously, should cost a little bit less. These are just suggestions.