Originally posted by uzi9mm
Airfilters greatly reduce the airflow too.
I would just clean out your computer every 2-3 months, with a can of dust off or a compressor.
I just ran some tests and under a full load, my case temp doesnt change, regardless of whether or not my intake filter is installed or not. It is a very fine filter, too. It actually came with my Thermaltake Tsunami case, so it is built right into the intake. I just checked it for dust and after just a month of running it actually had a decent amount of dust blocked.
So, I'm sure whether or not your filter "reduces airflow" is greatly dependent upon which filter you select... mine doesn't seem to hinder airflow, and it definitely blocks dust.