Best Computer for Gaming

I’ve been thinking of Alienware, but I’d also like to know of other good places that will assemble a quality gaming computer.. I don’t want to build my own, so please don’t post that.

how much would i be spending (australian dollars) to buy or make a gaming computer , i want it to be able to play games like battlefield 2, doom 3 , quake 4 , ect . should i buy or make ?

I would like input on what gaming computer i should buy. I have a budget of 00 without a monitor or speakers. Do I try and buy one from circuit city, or do I go to the gaming computer makers? For which one will I get more for my money? Also, I want this computer [...]

Post me a good link for building a good gaming computer with idiot-proof instructions. Pictures and good and so is very in depth and simple guidance. Desktop not laptop too by the way.

I just want a gaming computer that can run almost any game at a solid 60-100 FPS without any frame drops for around 1000$.

I have around 800$ to spend what is the best gaming computer possible for around that much?