I've worked on every thing from small engines to heavy equipment over the years, including 9 years as a setup/service tech at a Honda, Yamaha,Suzuki,Kawasaki, American Iron Horse dealer. In my experience Wix makes the best quality commonly available filter.
I've actually cut a lot of different brands of filters apart just to see how they are constructed. The internal craftsmanship of Wix is far above any other filter on the market from what I've seen. Wix filters have nearly double the media of a Fram and as much as 4 times the media of some other popular brands. I determined this by actually disassembling equivalent filters stretching the media out flat and measuring it. As far as the quality of the media I honestly cannot say in terms of filtration ability, but it appears to be of higher quality than other brands. I do know that all the old timers I know who work on equipment swear by Wix.
As far as reusable oil filters go, that's just scary to me, an error in cleaning and reinstalling can quickly become catastrophic, for the money I'll take a good quality spin on filter every time.
Some one above was discussing the use of screens rather than filters in dirt bikes and ATV's, that's pretty common in 4 strokes as well as 2 strokes even if the 4 stroke has replaceable filter it's not uncommon to have a sump screen.
My XR650L has a filter element , a sump screen and a screen in the base of the down tube/ oil tank on the input line to the pump. I clean the screens every 3rd oil change, I never find anything on them but I just can't live with not cleaning them.
