Honestly if you're not doing heavy over clocking you'll be fine with this cooler, I personally use it on my server build at home, but the NZXT x61 is a very reliable AIO liquid cooler, and there is absolutely no problems with leaking as its sealed very well.
http://pcpartpicker.com/part/noctua-cpu-cooler-nhd14
Honestly there is a temp difference, but that air cooler I linked is really high quality and works great! It will leave your temps a lot cooler than the stock cooler, but of course the liquid cooler option would offer lower temperatures.