I have to agree with Gort, oil impregnated K&N filters have mixed reviews by those that test them.
The media in a K&N is a quarter inch thick cotton gauze that is impregnated with oil. The oil traps particles in the air as the air moves through the media, so it is dependent on having enough oil and enough contact time to do the job.
Oil base filters lose oil over time as it dries out or get "occupied" after collecting enough dust.
Stopping
all the small particles of dust in the air (IMHO) needs more depth of filter / air depth of travel and rigorous maintenance of a fairly decent oil supply in the filtration media to work as well or better than a stock Suzuki filter.
Your Suzuki stock filter is good for several blow out cleanings and several years of use before plugging up so bad you have to replace it.
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This here is an oil war, if you want to read up on filters go here. Once you have read up some on the subject, feel free to go start you up a filter war.
http://suzukisavage.com/cgi-bin/YaBB.pl?num=1244205111