As to quiet, if you mean in comparison to similar laptops, I don't see it being any better than the usual. Not a simgle laptop I've seen has been "silent".
As to heat, it does have the dedicated video so it will be quite warm on some spot on the case. I do not have this unit to tell you exactly where, but ALL of these type systems have a warm spot. You have to decide if a little case warmth is worth the performance.
I'm planing on buying the Acer Aspire 2025. But I would like to know form where I can get it in the US/Canada? Also, what about the heat of this laptop? Is it cool, quiet?