Here's a picture of the M100 10th Anniversary Signature Edition
Yes it's about as expensive as M100+ and M99+ combined but it's a completely different amplifier unlike the two siblings that share the same chassis and parts. For one, it has a different set of tubes: 1 x NOS GE 6201 + 2 x NOS JAN Philips 5687 + 4 x 6CA7EH and 2 x Sovtek 5AR4 tube rectifiers. The output tubes are run at full class A which results to a cleaner smoother and more refined sound especially in combination with tube rectification. It has much bigger power and output transformers too which is evident when you lift it - its a heavier and chunkier amp.
This model was not supposed to be sold outside China/HK (which is why its manual is in chinese and there is no mention of it in the english opera website) but we got a sample and we liked it so much that we had to beg and make kulit before Consonance Beijing agreed to send us more.
It is my personal favorite especially with Living Voice speakers so much so that my trusty ole CJ Premier 11a has taken an extensive vacation hehehe ...