aliveatfive,
I don't understand why you are so unhappy about all this unless you are truly dissatisfied with the sound of your Summits. Unless I missed it, I didn't notice anywhere that you stated you were unhappy with them. Only that you were unhappy with the way ML has handled the rollout of the X series.
If you are happy with the sound of your Summits, as I am with mine, then take a deep breath and relax. Once the X is out, you can audition them and read the reviews and learn more about the differences between them and the original. And in the context of time and experience, all of this will seem pretty minimal, I think. Sometimes the announcement of a new product from a favorite company just sends everyone into a tizzy and no one is happy with the change. And then, as the product settles in and people get more familiar with it, they relax and appreciate its benefits (assuming it is a great product). As I mentioned above, people all over this forum went through the same machinations when the Summit originally came out.
It's always good to question your allegiance to any brand and compare them against others of similar quality in deciding your next upgrade. But I know many members of this forum, myself included, have repeatedly auditioned other great speakers and keep coming back to ML because the others just don't provide the magic that ours do (I expect Sanders and Maggies probably come closer than any of the others you mentioned, though). At the same time, I am sure there are people that leave ML for some other brand and never look back.
It seems to me you are taking this product rollout personally because you bought the top of the line and are not allowed to upgrade it to the new model. It is not meant as a personal slap in the face to you and other Summit owners. It is a simple business decision that ML had to make. They have shown a willingness to provide upgrades when feasible, and according to sources were considering it in this case, but they obviously determined that it just wasn't feasible. If you are really as upset about that decision as you say, why not call or write ML directly and ask for a response to your question? Ask them, as an owner of their former flagship speaker, why exactly they decided to not allow upgrades to the new model. I expect that you will get a full and fair answer, but I don't know. I would be interested to hear what they tell you, though.
I find it interesting that some folks buy whatever ML speaker they can afford, and own it joyfully for fifteen or twenty years before upgrading. Others absolutely must own the top-of-the-line new model every time it comes out or they are just not satisfied with their systems. This puts them on the roller coaster of changing out their speakers and shelling out big bucks every two to four years, and they are never satisfied for very long with what they have. Personally, I think that is a sad state of affairs. My suggestion, again, is to just sit back, relax, and enjoy the beautiful music your Summits are making and stop worrying about whether the midrange is as clear and open as it could be if you could just upgrade to the X version. If you enjoy what you have, what does it matter what new products the company is bringing out? The grass is not always greener.
As for the Summits, they were an incredible deal when they first came out. They were priced the same as the Prodigies before them, and that is pretty unusual in this business, especially for a top-of-the-line upgrade as radically different as the Summit was from the Prodigy. ML could have easily charged twelve grand or more for them right off the bat and most folks that wanted them would not have batted an eye. So it is not surprising that the X series will see a pretty good price jump. That is just the way business works. You have to recoup money from product development and you have to keep up with inflationary pressures and keep up with your peers in charging what the market will bear. The top speakers from other great companies are not cheap either, and I don't expect any of them always offer an upgrade path to a new model.
My expectation is that the Summit X will sound a little better than the Summit, but not enough to make it worth the cost and effort of upgrading. I felt, and still feel, the same way about the Ascents. My Ascents are original and I never felt the need to upgrade them to the Ascent i's. And, according to sources at ML, the Ascent i upgrade was more about esthetics than real performance improvements anyway. Now the CLX may be worth upgrading to, if I had the room, but is it's sound quality worth twice the price I paid for my Summits? Does it sound twice as good as the Summits? I seriously doubt it. So I think I will just relax and enjoy my Summits until I have a little more space and the CLX's are on the 'gon for half price.