my answer might be a little late...I run a VAC PA60 with a Shindo Mazeris Bellevus preamp (something like a older version of the Monbrison, old chassis version). This combination is very nice. The one thing you have to take care of is that the Shindo preamps are said to have a very high output, so a power amp with volume control might be better. Also keep in mind that some of the smaller models have no output transformer and a higher output impedance. It will work well with 100k of the VAC amps but might be limited in regard of very long interconnects.
Soundwise I cannot comment on the newer Shindo models. The older ones are said to sound somewhat more romantic, some like the older more, some the newer. From the limited experience with my amp I would suggest the amp to people who are looking for deep insight into music and emotion rather than sound spectacle...slam, resolution etc.