From what I've read, the use of similar driver material, such as paper for all drivers, aids in creating a smooth, seamless integration across frequencies while disparate materials, such as metal dome tweeters with poly midrange drivers, can create a disjointed sound with each driver having different resonant characteristics. While the use of paper cone tweeters can be an advantage, the 10.2 Series II speakers will be from 16 to 22 years old, and surrounds can be compromised due to aging in as little as 15 years. I don't know which new Bose speakers you've auditioned, but I've been happy with the latest version of the 301 (also uses dual 2" tweeters but with a single 8" driver rather than the two in the 10.2 system). They didn't sound very good in the store, but properly positioned at home and with a good source (LP12/Ittok/Grado Platinum/PH-1 phono stage) and amplification (Audio by Van Alstine solid state gear) they've provided very enjoyable listening.