Any parts preferences? Or websites you normally buy from (Newegg, Tiger Direct, Amazon, etc) ?
I wouldn't mind Intel CPU but a AMD is fine as long as it fits my budget.
Nvidia GPU's, Motherboards don't matter with the preference as long as its a fit for gaming, cases doesn't matter aswell as long as it has enough venting for the chosen items.
Power Supply 500 Watt & Up.