What is the difference in performance between the eD A3-300 (upgraded driver) and the Hsu VTF3-MK3? The specs on them look about the same with the eD being $225 less with shipping. I haven't bought one yet and was just interested in this before I made a purchase. By the way, I'm leaning toward the Hsu, but if the same performance can be had for $225 less, I'll take the eD. My room is approx. 4500 cu. ft. Any comments will be appreciated. Thanks.