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 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
Does anyone know of a system for $3000 or less (for a friend) that would be okay?