So i'm thinking about getting a new computer, my budget is at around 1000-1100$(including mouse/keyboard/etc) i was wondering if i should spend more on the components or should i spend more on the keyboard, mouse and maybe get a headset
Get the gaming components. You can have the best mouse/keyboard in the world but if your hardware can't run the game smoothly or clearly, what's the point? And you can always upgrade to better peripherals later on because they are relatively cheap.
Source: I have been playing with a $5 headset and a $40 mouse/keyboard and they have been perfectly adequate.