what machines run freebsd

[David Banning]

I am purchasing a new machine and I want to make sure that it runs
freebsd without any problem. I seem to recollect, going back in history, 
that "integrated" boards gave problems. These days, integrated boards
are the norm. I know that Abit and Asus used to be a good bet. What
about Intel boards? 

Is there any rule of thumb, or good pointers, or "absolutely avoid"
suggestions?