I've owned deCapos, effectively lived with the Vandy 2 in a girlfriend's home many (many!) years ago, and have heard the Vandy 3 pretty extensively.
In some respects, the Vandy 2/3 family is very different from the deCapo. Even putting aside the Vandy's extra octave + of bottom end, the deCapo is voiced quite differently than the Vandy. I personally find that both sit well within the range of neutral, but thought that the deCapo sounded slightly overdamped while both the Vandys sounded slightly underdamped. It's anyone's guess whether the change will appeal to you.
Good Luck.
Marty
BTW, the Quattro and 5 sound very different to me and - bass extension aside - much closer to the de Capo sound.
In some respects, the Vandy 2/3 family is very different from the deCapo. Even putting aside the Vandy's extra octave + of bottom end, the deCapo is voiced quite differently than the Vandy. I personally find that both sit well within the range of neutral, but thought that the deCapo sounded slightly overdamped while both the Vandys sounded slightly underdamped. It's anyone's guess whether the change will appeal to you.
Good Luck.
Marty
BTW, the Quattro and 5 sound very different to me and - bass extension aside - much closer to the de Capo sound.