From what I have read the bass on the current towers must be pretty good, so I am wondering...why not just a slightly larger driver, but very well designed and implemented ( as is the current 5 1/4" ). Would that not perhaps provide an extra ounce or two of bass while still keeping cabinet profiles a reasonable size and cost to a reasonable number? I ask because I recently had a pair of Monitor Audio Silver 6 (dual 6" drivers ) for 30 day trial and in my room their bass was substantial, well controlled and very musical. But I found the mids and highs lacking so back they went. Of course, I know very little about actual speaker design so I may well be missing something.