Fram filters aren't really high-end, if I can put it that way...Maybe a Fram Double Guard is ok...but I don't use Fram.
Also, the Ford OEM Motorcraft FL-1/FL-1A oil filters are supposedly a re-badged Purolator Pure One filter. It's supposed to be a pretty good filter.
I don't know anything about the K&N oil filter.
Jas84 if you do go synthetic, I suggest you use an engine flush to get all the junk out of your crankcase. I did it, and no harm. I bought a donor oil filter, just any old filter will do (I used a Penske PN8A), install that filter, top off the oil (you will lose some when removing the old oil filter), dump in the flush, let it run, then remove the Penske filter, then drain all the old oil out, then install new filter, and add new oil. That will flush it good. The idea of using the Penske filter for only 5 minutes and then throwing it away was to use a NEW and CLEAN oil filter to catch all the crap the engine flush released.