peterr53 - Wow! You answered one of my nagging questions: How would Ohms sound with a ribbon tweeter? So, we have to ask, which tweeter did you use? Is it a folded-type? I have really liked most of the Heil-type folded ribbon tweets I have heard. While the Ohm tweeter in my 2000s is good, I have long felt that it is not the strongest part of the design. I am helpless and hopeless when it comes to DIY, but I know some people who are quite good. Not sure I want to put my Ohms under the knife, but, you never know!
BTW, I like my Ohm center, in stock form, just fine. I sit pretty close, (~9 feet), and have a stand that aims the driver and tweeter right at my ears. But I do not doubt your own experience.