Thinking about investing in a air filter. Any comments with knowledge on them would be helpful. I have really bad sinus issues. I'm sick of the bi-monthly sinus infections and my doctor suggested I get one and look into installing a hardwood floor in my room (and when I'm able get my own house/apartment, to make sure it's hardwood as well) I posted this on my blog a bit ago, but that crowd is smaller and less diverse then this one. So.. yeah.