Listen to some Tannoys if you can IMO, they are every bit as dynamic as the Klipschs but less shrill sounding IMO.

That's something from the Prestige lineup. Maybe a Turnberry. $7000 10".Tannoys in a cafe, not optimally placed, and they had good bass, smooth throughout. Forgot the model designation.
Not quite - since they claim +/- 3dB 34-20k, it could be -6dB at 34. It's generally a safe bet that Klipsch is pretty generous with their specs. I'd guess it starts rolling off 45-50Hz, but I definitely don't know.They are claimed to half power (-3dB) around 35Hz.