James,You're in the right place. I must admit I'm not familiar with the Dared amp, but I took a look around and see it's a 6W single-ended integrated that gets good marks. If you haven't heard a tube amp before, you're in for a treat. Once you've heard one, you'll never go back (except for serious partying, perhaps).
If you search here, you'll see that there are basically two kinds of Pi users around here. Some, nothwithstanding the Pis' sensitivity, nonetheless hook them up to lots of power -- the drivers can handle it; they just keep getting louder.
Others of us use our Pis with low-power SETs. I for example have my Pi Theater 4s hooked up to a pair of 8W Welborne Laurels (sadly, discontinued). The Pis and 8 SET watts are a magnificent combination. Others, I believe, are using Bottlehead amps, and I have never heard a complaint.
I can't speak to Wayne's corner horns 'cause I have no corners.
Are you thinking of building or buying finished speakers?