Building your own PC would be cheaper and you could get exactly what you want.
But only if you have some experience or someone who knows about it to help you - I wouldn't advise someone with no prior experience to try it.
I'm not sure on components and pricing over there, I'm in the UK.
But I do know a fair amount about what's good for gaming and what's not, etc.
I'll stick around anyway and see if I can help out at all.