After using it for about a month or so heat is not a problem. I don't use any cooling mat, it just sits on my lap or on the desk and is fine - I had the same initial worry about the temperature but it isn't half as bad as I feared.
It is noisy but only under heavy workload. It doesn't bother me as when I game I use a headset anyway. It's not something I really care about but if you can't tune out noise then it may annoy you. It's a very subjective characteristic of a laptop, I'm sorry I can't be much more help.