Need advice on Fans,filters and Airflow

[York1]

Ok I have the Addtronics W8500 I have all the spots for fans filled Thats 3 92s in front + 1 80
1 80 on the side and 4 80s blowing out the back.The thing im curious about is if anyone uses filters on their fans?
The case itself has a filter but it restricts airflow alot even when clean.I want the best airflow but I also dont want mounds of dust and dog hair in my computer;( Worse thing is when the filter clogs just a little it starts drawing air in around the CDrom pulling dust in all around them too. For those of you that dont use any kind of filter How bad is the dust/pet hair in your case?
I think Im gonna remove the main front filter and just get a single fan filter for the 92 thats cooling my HDs

 

[R0b0tN1k]

My case is a friggin vacuum cleaner. I only has one fan plus the Ps fan, but it is FULL of dust. I recommend filters all the way, but you need to set it up right for them to work properly. Have more fans blowing in than out, only put filters on intake fans...it's simple, really. Find filters with a removable, washable media that you can quickly clean out when they start to look dirty. I'm gonna have to do something like this with the new system I'm planning.