Soundstage and explosive dynamics?

Not sure the OP mentioned the room size he/she intends to use whatever speakers meet his/her four criteria.

I think the smaller the room, the more I would agree with kosst_amojan and rbstehno that you don't need giant woofers for great dynamics. Well designed smaller woofers in numbers are rather potent.

However, I think extremely large rooms or even outdoor venues where one is wanting to top 100+ decibel levels is where the point about physics and horn-loaded speakers as suggested by analogluvr and phusis becomes more prevalent.

For a modestly sized home room space, I don't think 15 inch woofers and large horns are needed to achieve what the OP desires. On the other hand, if you're wanting to fill an "auditorium" with sound, I think you would have to go with multiple 15 inch woofers and horns.

^ There are plenty of large cone drivers can be driven to high levels with low power.

Many of the ubiquitous 3-way, narrow baffle, ~$3k towers can do dynamics fairly well, but I haven't come across any that can produce sound with the sheer scale of something like Klipsch Cornwalls. 

Question is do horns, generally speaking, produce life-like dynamics or exaggerated 'life-unlike' dynamics ?
As I understand, 15" woofer is difficult to make fast, maybe couple of 10" - 12" would be better ?
I would not expect any $3k speakers with any source and amps to give me a real scale, $30k would be a more realistic figure, I guess.
Having said that, I read some review of the Gryphon Diablo 300 integrated where the reviewer, after he had done his tests, tried this $16k integrated with $500 Elac monitor speakers, just for fun. He was close to shock - he didn't expect them to be able to play like that.
Speakers need great amps.