I have also gone through the same dilemma with the oil filter housing bolt and the engine oil pan drain plug. It appears the previous owner was a little overzealous when it came to tightening bolts. I finally worked the oil pan drain bolt loose with some patience, but even with a 6 point socket I severely damaged the oil filter cover's bolt head. So much so that I had to replace it. I'm sure someone has posted this before, but for those who are wondering, the oil drain bolts torque values are as follows...
Oil tank drain plug - 24 ft lbs
Crankcase drain plug - 24 ft lbs
Oil filter housing bolt - 20 ft lbs
Oil pan bolts - 7 to 10 ft lbs
Hope this helps someone in the future. Also, a little anti-seize on the threads of the bolts helps a lot the next time you remove them.
I bought an adapter kit that lets you use a spin on oil filter instead if the internal filter that came stock. It makes it easier to change the filter, and I suspect the larger filter does a better job of filtering the oil. The only drawback is you lose the cool finned filter cover when you use this option. You can even buy chromed oil filters for a good look. I use the one from K&N.