bandit78,
"small" and "effective" are mutually exclusive terms when it comes to air filters.
Just look at flat track racers (i.e HD XR 750), their air filters are anything but small.....
I know that some sports bikes until the mid 70s and many cafe racers and customs used open velocity stacks. They surely look great, but then they also needed frequent rebores (or did not see much use....)
The particles causing the most wear in engines, are actually those that have the same size as the engine clearances, allowing them to enter the gaps between moving parts. So the mesh is not doing much to prevent wear, only preventing larger particles from causing sudden failures.
I would recommend that you put function before "style", "cool" or whatever it is perceived as. The end result is often more stylish, if form follows function. This may be more demanding to acheive, though.........In your case, an alloy "velocity stack" that went through the side cover, with a K&N or UNI filter inside the side cover would look sleek, and provide useful filtration.