I suggest choosing amps for speakers, not speakers for amps.
Interesting, and why is that? Is it the speaker that primarily determines the quality, or "flavor," of the music reproduction? I'm genuinely curious. I purchased my last system 30 years ago, and the salesperson essentially put the components together for me.
Either way, I'm kind of committed at this point. I got a great deal on my Wyred4Sound preamp and First Watt amp. All the reading I did indicated that those two components would "play well" together. So at this point I'm trying to select a speaker that is easy to drive.