Shindo Monbrison better a RedWine Isabella?

Westexdent,I also have the latest version of a Red Wine amp,albeit a 30.2 LFP-V edition,but I do agree it's definitely a step up from the previous iteration.I really can't say anything negative about it.

According to another thread Audiofreakgeek is a dealer posting without disclosure.

It sounds like it would be best to ignore him.

The Monbrison is a fine preamp just make sure its an impedance match with the Red Wine amps. There is a lot more information and Red Wine owners over on the Audiocircle forum. A good person to contact would be Louis at Omega Loudspeakers. He has a lot of experience with Red Wine (he used to use Red Wine at shows paired with his loudspeakers) and would give you an impartial opinion about which tube preamps would provide good synergy.

The Monbrison will drive anything. The Zout is very low. It is sometimes misstated as 5K but that is actually the minimum recommended load.

The Monbrison's output impedance is 5k. I think you are mistaken about it being able to drive anything.
All of the Shindo preamps higher up than the Monbrison in the line-up do have low output imdedances that can essentially drive any amps because they have transformers that lower their impedance. The Aurieges, Aurieges-L and the Monbrison do not and, consequently, their output impedance is in the 5k range. You must be more careful matching amps with the Monbrison than a Massetto, Giscours etc.