I have all the String Quartets played by various ensembles.  But somehow I
lost the middle and late quartets played by the Quartetto Italiano which
was for my taste the best.

Now there is an offer of several complete sets by the:

Alban Berg Quartet
Alexander Quartet
Quartetto Italiano
Vermeer Quartet

I am tempted to buy the Italiano, but I would like to hear some opinions.

Thanks,

Ramiro Arguello