Disclaimer: I am a JMR dealer.
The Trente is easy to place near a rear wall because of the front port. If you are 16" away you should be fine. They do have quite a bit of bass but are a good match for your rooms size. I have not heard them back to back, but to my memory your Dynaudio's will have faster, more taut bass while the Trente's are fuller with more of a sense of weight. See www.positive-feedback.com for some reviews.
As for comparisons to the Twin, the Trente is very similar in sound but more transparent with deeper and fuller sounding bass.
The Trente is easy to place near a rear wall because of the front port. If you are 16" away you should be fine. They do have quite a bit of bass but are a good match for your rooms size. I have not heard them back to back, but to my memory your Dynaudio's will have faster, more taut bass while the Trente's are fuller with more of a sense of weight. See www.positive-feedback.com for some reviews.
As for comparisons to the Twin, the Trente is very similar in sound but more transparent with deeper and fuller sounding bass.