What is the best air filter for eliminating dust mites?

im allergic to dust mites...long time sufferer, and ive tried the ionic breeze and the Oreck XL, and those dont work worth crap. im still congested every morning with sore throat and headaches and i feel weak the whole day. i just need an air filter that works so i can breathe......does anyone know the best air filter out there for dust mites?...it would mean the world to me to find out. thanks in advance