Hi yyzsantabarbara:
I have been using VAC preamplifiers for 20 years and my Signature IIa mates beautifully with the Coda 16.0, making a great amplifier even better! I truly have no interest in trying other preamplifiers as all my VACs have mated great with SS and tube amplifiers. Highly recommend any and all models from the Renaissance V on up. All the best!