Jeff Rowlands Amp and Dac vs. VAC amp and DAC


Hello, I am new to this forum but I have a question. I am trying to pair an amp + DAC with my Wilson Sabrinas. I have listened to Jeff Rowlands integrated with the Aeris DAC. And the VAC Sigma integrated with the Aeris DAC. Price is a factor and so is space. Does the 625 need a pre-amp? Any suggestions or thoughts? 
rinpoche
rinpoche,
I which I could say something to reassure that you're going to be happy with Jeff Rowland, but I can't. Components are very personal, so you never know. In my system the 625 S2 is by far the most musical amp I've ever had.  After 30 years in this hobby that's the best compliment that I can give. Unfortunately,  it doesn't mean you will feel the same. Best of luck to you. 
Rinpoche,
I am writing down my prediction as follows :- SWCRABVHWI.
Let's see what happens.  Good luck!
J. :)

Hi Ricred1,
In some systems to certain listeners  the Gryphon will be preferred to the Rowland.  Change the listeners and or the system and suddenly the Rowland is deemed the superior amplifier. In the realm of upper tier transistor power amplifiers both stand tall. If I've learned one thing about audio system assembly it is that synergy is a real and major factor. 
Charles,