I think the lack of enthusiasm for the micro style speakers is probably because many people are so enthusiastic about audio that they can't imagine compromising on sound to the extent of buying such small speakers.
There are some situations where you absolutely need small speakers, and the Gallo Micro (and now the Micro Ti) line is a nice solution. I'm considering them for use with my computer since I do spend several hours in front of my computer, and while I'm currently using Sennheiser headphones and a headphone amp, I'd like to be able to listen to speakers while using the PC and everything in the PC audio space seems totally horrible to me, so I'm investigating a Gallo micro based setup for my PC. The A'Diva extends lower than the Micro, and would have slightly more heft.
When choosing a subwoofer (and a subwoofer IS required if you want any realism in the music) you'll want one that sounds good all the way upto 100hz for seamless integration with the Gallos - the REL should be a good candidate.