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
Cables are truly system dependant. I use Wireworld Platinum cables. I have your amp and DAC with the Corus preamp.
I understand. The problem is how do you try out various cables, especially if you are trying to buy used to save some money? I take your recommendations seriously. Thanks, R
Yes, Transparent Audio Ultra, Shunyata Cobra, and Cardas Clear. Audioquest Wel Signature cables are way more money than I'm willing to spend on cables; therefore I've never auditioned them.
There is a Wel used on Audiogon. Wilson likes Transparent. Okay, I will figure this out too. many thanks, Ellen