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
Swiss have their own ways of doing things and they would expect you to follow them precisely. They also charge you for the honour of owning their equipment. Double the normal price, I mean. Not for me, thank you. As an exotic very expensive choice I would consider Ypsilon Electronics from Greece. $25k for hybrid integrated.
I have owned a Vac Sigma 160i integrated for 4 years. The tubes have not needed replacement during that time, and biasing the tubes needs to be done rarely, and literally takes a minute or two. It is a very simple procedure. Don't be concerned about the Sigma being "high mantenance". That has not been my experience. 
Regarding running the tv through it, that would add a lot of hours to the tube usage. I would suggest another solution for the tv, I bought a B&W Panorama soundbar for mine.
Thanks Heymikey. I appreciate hearing that. If the JR doesn't work out — VAC is the next choice. 
Buying a Swiss amp is like buying a pair of Italian shoes.    Very nicely crafted but not for everyone.   There should be a very good reason to go that way because nobody has cornered the market yet on top notch sound or nice shoes.
I am going with JR!! Home audition with the Sabrina's tomorrow morning. Yipee. Will let you all know. THANK YOU for your advice and support. R