If I were to elevate the speakers about .25" off the actual baffle with MDF rings, and glued a .25" thick piece of sound absorbing foam to it (so its flush with the speakers), would it help reduce the baffle step and diffraction? Maybe I should draw it out. I saw something like this at a local hi-end audio store. The mid-range and tweeter both had a piece of foam mounted on the baffle around them. The foam peice was about .25" higher than the drivers. The woofers had nearly flat cones and they even had foam on them. It seemed odd, but the speakers sounded great.