My current favorite complete recording is the Mandelring Quartet on Audite (SACD). The playing is amazing, the sonics outstanding. The Mandelring play these quartets so that the music shines through. They are humane and lovely interpretations that lack some of the slash and burn style these quartets receive by others.
I also have the Emerson (DG) and Borodin (EMI) sets on RBCD. The Emerson play with incredible precision but leave out some of the humanity of the quartets. I admire their playing but don't love their interpretations. The Borodin fall somewhere between thr Mandelrings and the Emersons - they bring an authentic Russian ethos to the works but the ensemble playing is nowhere near as precise as the Emerson's nor as supremely musical as the Mandelrings.
Lot's of choices out there. Hope my descriptions help.
I also have the Emerson (DG) and Borodin (EMI) sets on RBCD. The Emerson play with incredible precision but leave out some of the humanity of the quartets. I admire their playing but don't love their interpretations. The Borodin fall somewhere between thr Mandelrings and the Emersons - they bring an authentic Russian ethos to the works but the ensemble playing is nowhere near as precise as the Emerson's nor as supremely musical as the Mandelrings.
Lot's of choices out there. Hope my descriptions help.