Your to buy list for 2015 (only gaming)

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daredevil.shark said:

My PC is almost dead. Plus the PC games I play are very old (out of nostalgia) and they are mainly RTS games. I am still confued. I think my dilemma will be clear in next 6/7 months. Lol.

To me it sounds like you only really need/want a mid-end PC. Something that would cost you about $400-$500, if you lived in the U.S. I don't know how much it would cost you in your country. You might want to check this page. They have various builds. http://www.reddit.com/r/PCMasterRace/wiki/builds

Their new $555 build ($620 before rebates) will let you play almost every game at High, 1080p 60fps. It comes with an r9 290, and you can overlock the processor and play PS2/GC/Wii/PSP games through an emulator at reasonable speeds/resolutions. But if all you want to do is play old RTS games, then a computer that costs quite a bit less would work well too. 

If you're waiting 6/7 months you'll be able to find something even more powerful for that price.