This is what I have so far. I'm having trouble picking out a video card. I'm looking to spend about $150-200, but could probably go a little higher if it would be a massive step up in performance. I mainly intent to use this computer for League and steam games, so it doesn't have to be ridiculous.
If anybody could recommend a nice mouse/keyboard for around 100 total that'd be awesome too.
Aftermarket cooling is completely unnecessary if you're not overclocking. The processors come with their own heatsink and fan, any cooling you're buying just replaces that.
This, and that CPU has a locked multiplier and the chipset doesn't support overclocking so you won't be anyway. The stock Intel heatsink is fine. If you find the noise bothering you, you can get an aftermarket cooler which would probably cause your CPU to run a little cooler/quieter, but it's hardly necessary.