I built my PC on a budget with a mini tower and in the summer months it does get pretty toasty when gaming. Decided to get a bigger case with better airflow as an xmas present to myself, but unfortunately I'm a sucker for gimmicks and the more I looked into it the more dollars I spent haha.
This is my old case as I started pulling its guts out:
Ended up buying all this. Oops...
And some pictures of it all together:
Totally unnecessary but awesome. You can change all the colours and effects on the lighting. This video is 'Spectrum Wave' which looks pretty cool. The photos/video don't do the colours justice though.