First, let me state that my ears are VERY sensitive to high frequencies. That said, I had a pair of 2.5i's and found them to be too harsh, very bright. They were matched with Adcom amps, not exactly the smoothest mids and highs. I ended up trading them in for a pair of VT1.4, I believe they have the same aluminum tweeters. Again, too bright for my ears. I sold them and picked up a pair of VT1.2, these have the soft dome tweeter. Much smoother, but still bright, no doubt revealing the nature of the Adcoms. I upgraded from the Adcoms to a Sonic Frontiers SFS-40. After some extensive tube rolling, I did find a good combo that took the bite out of the NHTs. I think it is just the nature of the beast. The VT2.4s are great speakers. Diligent equipment matching can tame them.
Happy listening!
Happy listening!