No, the speaker system doesn't necessarily sound better with the V200, What it does allow me to do is run 3 amps off my Transporter: XLR to V200, then unity gain through to my Burson PI-160 integrated. The RCA outs from the Transporter are connected to my Decware CSP2. I then connect the CSP2 to my Burson on the power amp input. This way I have a SS headamp, SS integrated, tube headamp, and tube pre. Gives me lots of options and flavours!
My V200 does have the dac, but I have never used it Probably unlikely to given the rest of my gear. I bought the V200 before they made the dac an optional extra.