Just to respond with a bit more detail to some of the comments made. First, I hope it was clear in my review that I really like the D25. I think it is one of the better speakers out there at and above the price point. I agree with Nathan that Proac has moved toward "accuracy" with the new D series having heard both the old 2.5 and 3.8 and recalling them as having a more liquid midrange and a warmer presentation. This is something I wish the new series retained, but with the extension, speed and dynamics of the current lineup. As such, and as I speculated (and Nathan confirmed), the new series is probably best matched up with tubes (and is designed to accomodate them with the higher sensitivity drivers etc.). Whether the use of different tubes in my setup or in another all tube line up can take the sound further in the direction I'd like to see it go I can't say--having yet to experiment in this area. I do feel that the bass anomolie that I am hearing will not be cured by using different electronics. As I indicated, this is noticable only on some recordings (though more that Nathan reports in his system) and is, for me, a distraction that I find hard to overcome. Of course, my room may be part of the problem but this would be the second room that I have heard it in so I'm not so sure. Again, the D38 goes a long way toward resolving any problems in this area in my experience.
Finally, I thought I would share one other set of comments about last night's listening that illustrate the differences between the C7 and the D25. I put on REM "Green" last night and cranked it up. Now admittedly this is not the best of rock recordings--but that is my point--I have a lot of records like this that I love that are no great shakes sonically. What the D25's did with this record was very interesting. First, I heard so much more inner detail--things I have never heard in this record before. For example, the Peter Buck's leads had, literally, 30% more notes played in them--thus was the speed of these drivers. I could hear these notes within the layer of sound as I never heard them before. Astonishing. However, I kept having to turn the volume down (instead of up as is my tendency) because the glare in the upper midrange (guitars, vocals etc.) was bordering on unbearable. Things simply sounded hard, white and edgy. Yes, it was dynamic and detailed. There was an aggressive quality to the sound that is appropriate to rock and most likely the recording venue. But wheras with the Harbeth's I can go louder and louder allowing me to become more and more consumed by the sound the D25's needed to have the volume trimmed. Could I hear all the details before with the Harbeth's-no. Nor did the bass go as deep, nor were the dynamics as good. But on balance I'd rather be able to pull out a record like this, turn it up and break out my air guitar and miss some of the fine details than have to turn it down to save my ears. Obviously, as they say, your mileage may vary. I'm gonna keep listening to the D25's--they grow on me more and more each day. Perhaps with the right gear they could be the right speaker, but maybe not. Thanks for listening.