As I said, there are a lot of considerations like which sites you want to use, which brands you prefer, maybe you use the PC for other things too, maybe you like aluminium cases or cases with bright lights, you may or may not want to overclock, you may or may not care about low noise, you may or may not want multiple monitors, you might only play a certain game or a certain genre, maybe you want a PC that boots quickly, maybe you need a full system or you might have a few things already, maybe you want good sound quality etc. etc. etc.
Just off the top of my head, they are some of the things we will want to know to be able to properly help you. Have a look for that 'How to ask for new build advice' form at the top of the forum, fill that in and I'll be happy to give specific advice instead of vague suggestions.
I don't mean to sound annoying, I just want to be able to properly help you.