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,
Absolutely logical explanation and response. It isn’t "always" necessary to take baby steps. Your Wilson and Rowland system have you perched at a pretty high level in the realm of High End Audio . Finding a highly regarded cable (that’s needed to complete your system connection ) for a very attractive price makes nothing but good sense. The Mogambi suggestion was made in part to satisfy my selfish curiosity. You have good ears and I would have been interested in your listening comparison.
Charles,
Maybe one day Charles1dad!
I am finding that transcendental moment even with the Transparent loaner cable. I think the AQ is going to be amazing. I really do. But I will let you know next week when it arrives and settles in. 
Rinpoche, 
It's funny how we choose to listen to the advice that suits our needs. I understand what Guido said about the 625 and Aeris DAC, but he doesn't have the 625 S2 with his Aeris DAC...I do. I'll be the first to say, it's only my opinion,  in my system,  but there is a significant difference between the 625 S2/ Aeris DAC and the same combination with the Corus. In my system, with my ears, it isn't close. ..more dynamic, air, and just a sense of ease with the Corus.