Red and black always looks good. My heatsink is a Noctua but I used a low TDP CPU.
I did test the case with actual 3.5" 7,200 RPM drives. And they weren't very loud. They fit quite snugly and have no real wiggle room to virbate with, if you ask me. I'll be adding new ones, soon.
You don't NEED a blower style cooler. But I'd recommend one. Most non-reference coolers are too wide to fit properly, if at all. Don't forget, you need space for those power...