I just thought a sticky would be a more organized, but there are many topics for the Win 8/ 64 bit controversy.
I posted this in another topic, but it helped me make up my mind for now.
I love this summary from Focusrite about Windows 8 drivers for most products over a year old:
If you are serious about music making or rely on your Focusrite hardware to earn a living, we strongly advise that you wait for at least 6 months or more before updating to the latest OS until any unexpected issues arise and are dealt with. no support yet for the Saffire Pro 24 so guess I'll wait.