Well, hopefully you would be using a high pass filter on the HT2's. It would be pretty hard to get a smooth blend otherwise, unless the sub was only operating below 30 Hz or so. But with a high pass filter, and with a crossover in the 60-80 Hz area, you would be taking a lot of the load off of the W18's. Would this really improve the midrange? There are more opinions than facts on that one. But if you ever make it back to Bethesda, you can help me lug my HT3 upstairs and at least see if you can hear much difference in the midrange with the HT2's running full range.