As long as the heatsink and fan fit in to the motherboard you jhave nothing to worry about
Thanks for the answer .
I ended up getting a 2nd hand Arctic Freezer 4 cooler which according to reviews/info might be better than just the stock heatsink and cooler.
Yes, you should always use a FHS that is designed to work with your processor.
Just because it fits will not mean it will work.
A 65W processor and 95W processor can use the same FHS if it was designed for the 95W processor.
Using a FHS designed for a 65W processor on a 95W part will potentially case you problems