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
I have learned from all of you. In the end, it will come down to 'my ears and my wallet' -- and your advice has helped a lot. This gave me a forum to discuss and learn. 
Getting the amplification, speaker, room part of the system optimized together to a good degree is the most critical part to get right technically.

With that you have a solid foundation to work upon. The rest is much easier to get right as long as one knows what kind of sound they are seeking to start with.

You can’t hit the target exactly without a solid foundation to stand on or if you don’t know where or what the target is exactly.
Inna,
Life is too short to argue over audio. My advice wasn't address to anyone, but to say to the OP trust your ears. Arrogant is one thing I'm not, I'm very humble and know this is all stuff, not life and death. 
Riced1,
You hardly came off as arrogant (quite the contrary ).  Anyone know of a perfect audio product?  If so please share with the rest of us. 
Charles, 
" Life is too short to argue over audio. "

I agree.

Even  worse is arguing over wires not to mention fuses.