High Current Integrated Options for Manger Speakers

No experience whatsoever with Manger speakers.  However, very happy using Coda CSiB Integrated amp to drive a pair of Thiel CS 2.4 speakers which are notoriously hard to drive (nominally 4 ohm impedance, but dropping to under 3 ohms at 600hz).  The Coda amp is a solid state class A/B design, built in the U.S., and available in 3 versions.   All 3 versions go for the same price (list price is $7500), but have more or less watts biased to class A.  I have the version 1, with 150 watts per channel into 8 ohms, with first 18 watts in class A.  The versions 2 and 3 have less watts in class A, and more watts available in class B.  All versions continue to double down as you halve the impedance.  The Coda comes with a 10 year warranty, first 5 of which is transferable.  The principals at Coda worked with Nelson Pass at Threshold.  You may wish to call Coda and talk to Doug Dale.  I purchased my amp new from Audio Archon, and Audio Archon and Mike Kay are very good to deal with as well.

You might find the Circle Labs A200 interesting. Here's a thread on Audiogon where owners share their opinions, and here's a comment specifically about Circle Labs and Manger (link):

I am a very proud owner of a Circle Labs A200.  To say it has helped transform my system would be an understatement.  Everything that has already been said, I agree with.  All I can say is that paired with my Manger Z1 speakers, I’ve never been happier.  Music comes alive now and I find myself more engrossed in each song.  It’s definitely a keeper.

Used Gryphon Diablo 300 should do it. If you like its presentation. It will be a little over $10k but not by much.