Tubeears, I see some members have been critical of your thread. I can see a bit of myself in you however. I know what it's like to put a high end audio system together on a modest salary & tight budget. I have made similar choices at times, go without clothes, eating out, even buying budget food in bulk to get through the week because of audio purchases. Most folks would think you're crazy, but they don't understand your passion and drive to follow your audio dream.
Here is my advice, I own a pair of Magico S5's which have a beryllium tweeter. It is an amazing tweeter and imho is better than the Accuton diamond tweeter. I had a quick look at the Reference 3a BE driver. It looks good, but most importantly if the speaker has been matched to that driver, it should blend in seamlessly. If it won't kill you, i'd go for it!
Here is my advice, I own a pair of Magico S5's which have a beryllium tweeter. It is an amazing tweeter and imho is better than the Accuton diamond tweeter. I had a quick look at the Reference 3a BE driver. It looks good, but most importantly if the speaker has been matched to that driver, it should blend in seamlessly. If it won't kill you, i'd go for it!