So if a good amp will make bad speakers sound good, then what does a good amp do for great speakers? I would argue that the gain is greater when resources are allocated to the speakers if there are not enough to buy both great speakers and a good amp. The quality of the amplifier does make a difference, but it is arguably less of a difference than a set of good speakers. I know someone else already mentioned this, but I will second it - focusing on a good set of speakers and a good DAC will deliver more benefits to the sound than just buying a good amplifier.
As far as the thread is concerned. I own a Sherbourn LDS 12/900 and it is wonderful sounding. I'm very impressed with it. I'm using a Rega Planet CD player, Anthem AVM20, and 100db @ 1w/1m full range single driver speakers. Because of their efficiency, I can hear ever detail in the system. It makes it easy to hear differences in gear changes, and interconnect quality. Shortly after getting the speakers, I tossed the Monster Cable interconnects and replaced them with solid silver ones. It was as audible as getting a new piece of gear- specifically in the vocal frequencies. I gained more range on the lower vocal frequencies instantly. I considered that I could be just imagining it, but my parents can hear it and they are approaching 70yrs old. Consequently, my mother commissioned me to do the same for her audio system. My point is this... with the ok speakers that I had prior (Kef q80's), I could hear the difference, but with my new set of speakers, it was entirely obvious. With a poor set of speakers, I suspect that the difference would be less obvious - even with a good amplifier. Because the difference is so audible, I have since constructed all of my own interconnects using silver wire, in addition to making my own power cords as well. It really makes a difference and that difference is audible with good speakers.