This thread has a link (first post) to a detailed oil filter comparison:
http://www.fordraptorforum.com/f7/oil-filter-comparison-25753/
After reading the comparison, I decided to use the Wix filter. They are on Amazon for less than $9.
For oil I use Mobil 1 extended life and I change it every 5k.
The Amsoil filter is conspicuously absent from that comparison. But for the sake of comparison, I have posted a similar cutaway for the Amsoil filter below. Also, even though the retail price of that filter is $17 and change, I can get it for less for those that want to contact my personally about their purchases.