The V140 amps are very special amps. I owned a V70 for many years and now own a Ref 110. IMHO only the recent Ref series amps are truly better than the Classic and V series. If you have not replaced the large caps, I would check them as they are about 20 years old now and could start to leak.
ARC has made significant improvements with preamps in the last 10 years. If it were me I would look for a nice used LS27. I would be a really good match with the V140s.