I like the K701 style and appreciate the precise, almost simple sound of the Ety. I can only speak of the D5000, which is of course, the opposite in style; an almost sumptuous bass, rich and velvety, quite full and appealing in its own way. I have to say that I have never cared much of the "bass boost" sound, but the Denon makes a good argument for a full bass, especially with its truly powerful sound. Rock music in particular has a force that's hard to forget.
But the Denons are very different from the Ety/K701 sound. For some, the D5000 can be seen as a complement to the D5000.