I own a Ref 110 and I just love it. I have heard the VS-115 but not in my system. My dealer is like yours and does not carry a demo of the VS-115. He carries demos of some of the more entry level ARC and then some of the Ref stuff.
I think that the Ref 110 is pretty much in the sweet spot of the ARC line. The Ref 210s are a bit better but IMHO not enough to be worth all the extra costs involved. At the time I do remember thinking that the VS-115 was much better than the VS-110. But this was before I had heard the Ref 110. And it wasn't good enough to make me seriously think about upgrading from my VT-100 mk3. After having my dealer's demo Ref 110 in my system for about a week I did not want to return it. It was that much better than the VT-100 mk3. I sold both my V70 and VT-100 mk3 and I bought a Ref 110.