Thoughts on VAC preamplifiers to drive D’Agostino power amplifiers? Thoughts?

Hi George: My source is an EMM SACD player/DAC and speakers KEF Ref 3’s.
Thanks!

ebm: thanks very much for your post. Is your recommendation based on personal experience with a VAC pre-D’Agostino amp in your system? Thanks!

Thanks so much; actually I have the VAC preamplifier (Sig mkIIA) and I was wondering if anyone had matched a VAC preamplifier with any of the D’Agostino Momentum or Progression amplifiers. Yes; I like and have tried the VAC amplifiers. This time I’m considering a high power solid state amplifier. Need not be a D’Agostino but the new Progression S350 interests me. 

Thanks to all. Guess I’ll take my preamp on a road trip to a D’Agostino dealer. Your points are well taken and prudent. The finest individual components, even when electrically compatible, may not be synergistic or pleasing together… especially  at the price ranges we’re speaking of! I appreciate all your helpful advice.

Thanks for that, ebm!