Have you got any games you want to play when you get your new PC, so we have something to go on?
I could be wrong, but it seems like you've got this all backwards and you're buying a new PC without really knowing what you want to play? I did it once when I hadn't had a gaming PC for a few years and it was a waste of money, I'd find myself buying and/or installing games and spending 5 minutes on them.