Thanks, Paul. I'll have to look up those Dahlquists, they look interesting.
I enjoy used speakers as I rotate a lot of gear all the time, buying and selling. I probably wouldn't want to spend 5k or anything like that. I've been eyeing something like Kefs for their proposed great imaging, but I don't know if they are sensitive enough. I like the idea of a large soundstage that makes speakers disappear. I'm sort of looking for speakers that have that big enveloping trick going for them.
I'm also just interested to hear what people use in general, regardless of price.