MF Audio: Very good sounding unit, okay on price/quality but as far as high-end goes; it's a very good deal. A bit on the sweet/warm side with voices, maybe missing a little sparkle in the highs, but very comfortable to hear and enjoy.
Silver Rock: Divide the price by 4 and it could be a good buy. Some imbalance in sound and annoyance with longer listening made me test this unit a bit further. Induction measurements showed about 30% deviation between the left and right units, this explains the annoyance and imbalance as one channel was producing less in the bass/lows. I was quite shocked to see this kind of difference in such a high-end priced unit. This unit has great potential if they would test/match before shipping it.
Tribute: These are only available as a separate volume controls, you have to make your own housing around it. Result is that they are by far the most economical to get at around €350-400 I think. For sound quality they certainly get my vote; very neutral and not attracting your attention with any flaws. Highs are good, mids are good, bass is good: nothing left to be desired. You will not get bored listening to these and you will not get annoyed by a suspicion that something is wrong but you just can't punt your finger on it. Best buy without a doubt in my mind. You can get them in a single axle stereo version, or as separate mono versions as shown in the picture below.
© Jim de Kort