Hi Studley,
Yes, indeed, 25W amps would do fine, and I've actually driven them to conversational levels with my rip snorting 1.8W single ended triode amp, just for a laugh. In truth, I didn't laugh, I picked my jaw up off the floor......
There is one in Kent, in fact, but at this stage I understand it's not yet built, but I can keep you posted.
These speakers are quite similar in sound to the PMC transmission line, the OB1. They have a little more clarity and bass, but the tonal balance is alike.
Hope this helps,
Cheers,
Hugh