I have not heard the Spectron but have heard the other 3. The Berning is going to be tough to find used and is no longer available new from what I have heard. The Moscode is a great amp. I believe the new model 402 is being debuted at RMAF this month. I'm confused as to whether it will replace the 401 or be available in addition to the 401. Price tag on the 402 is about $6500, but Moscode allows for 33 day in home trial period. After I hear the 402 next week I may bring it in for a listen. I've always liked the Moscode design.
Of course you've read my opinions on the D-225. Bottom line though is these are 3 great options. I don't think you could make a bad choice.
Of course you've read my opinions on the D-225. Bottom line though is these are 3 great options. I don't think you could make a bad choice.