Also do you guys think I need to add a cooler or should the fans on the case be enough?
Get 8GB of RAM instead of 16GB, most games today only use around 3GB. Drop the 750w to a 650w if your not going to do a crossfire config. This PSU will suit your build. http://www.newegg.com/Product/Product.aspx?Item=N82E168... I recommend the Hyper 212 EVO just because of the price/performance. It can outperform $60 water coolers and also be a lot quieter.