Newest Generation of Shindo Preamps

Has anyone heard the new generation of Shindo preamps? I hear that changes were made to the line around 1-2 years ago. There are probably not that many of them in circulation as of yet. I am wanting to purchase an Aurieges for a system, and debating used vs. new. I would love to hear some impressions on the newest generation and whether they provide a sonic improvement over the prior generations. Thanks!