Whats your budget?
Whats your monitor resolution?
What are the games and quality settings you like?
Which parts do you need? (PSU, GPU, CPU, MB, RAM, HDD, SSD[dependent on budget], CASE, OPTICAL DRIVE, OS, CPU COOLER)
Are you considering OC?
Are you considering CFX and SLI?
Which country are you buying from and when will you buy it?