shrapnel: the CJ ET3 and Classic 2 preamps are completely different designs, with no relation other than they were both designed and produced by CJ. The ET3 is based on technology used for the GAT preamp while the Classic 2 is essentially an update of the PV-10BL preamp. Both are great amps but were designed for different user expectations and different price points.
patores: personally, I would take the advise of the others who have advised you to skip the preamp/DAC combination. To paraphrase Peter, Paul and Mary "Preamps live forever but no so little DACs..."