Well, you already have the "older brighter" tweeter in your current HTM2 center. However, the Rotel amp you just bought is going to be a higher resolution and higher current amp than your Denon receiver (something that is important to make these B&W speakers "sing"!). I would almost say to wait until you had the Rotel playing in your system before making a decision. That extra resolution and current could actually increase the response and harshness of your center tweeter and that would tell you whether or not you could live with the cheaper HTM1.
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That being said, when comparing to your current HTM2:
- HTM1 will have clearer midrange because of the B&W separate midrange driver. It will also have deeper bass authority, which will give better tonal definition to male voices in movies. I recommend setting the center to "FULL" or "LARGE" in your Denon so that it plays full range and does not send anything to the sub.
- HTM3S will have the same clearer midrange and deeper bass, but it will also have less harsh highs.
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So yeah, ultimately, the HTM3S would be better and I would definitely buy that instead, but it is dependent on where your "point of diminishing returns" is and what your willing to spend.
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TIP: Both the HTM1 and HTM3S are rear vented. This means that you should space it away from the front wall just a little bit (like 12"). And make sure you do not have any sound absorption material against that front wall that could "absorb the bass coming from the vents".
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That being said, when comparing to your current HTM2:
- HTM1 will have clearer midrange because of the B&W separate midrange driver. It will also have deeper bass authority, which will give better tonal definition to male voices in movies. I recommend setting the center to "FULL" or "LARGE" in your Denon so that it plays full range and does not send anything to the sub.
- HTM3S will have the same clearer midrange and deeper bass, but it will also have less harsh highs.
----
So yeah, ultimately, the HTM3S would be better and I would definitely buy that instead, but it is dependent on where your "point of diminishing returns" is and what your willing to spend.
---
TIP: Both the HTM1 and HTM3S are rear vented. This means that you should space it away from the front wall just a little bit (like 12"). And make sure you do not have any sound absorption material against that front wall that could "absorb the bass coming from the vents".