Which very dynamic speakers would you recommend?

Based on your existing equiptment, try Kef Cresta 2 or 3s. They are cheap and clear sounding with good tonal balance. If you are planning to upgrade your electronics, buy the best speaker you can afford. I do not find the Paradigms dynamic at all. They are dull, distant, with very little low level resolution and definitely lacking in "prescence."

Paradigm Studio 100v2. You can buy them brand new in Canada cheaper than if you were to buy them used in the States... The only problem is that they're big... Hard to cary on the other side of the borders...

If you can spend $4,500 US, there is someone that sells a pair of Verity Audio Fidelio. I sold my Paradigm for a pair of Fidelio. The Fidelio are 5 stars speakers for the price...

I second the Legacy Audio recommendation if you want to go higher than Paradigm. I have been a Paradigm owner for a while and would always recommend their line.

In the real expensive category, check out the Avante Garde horns

how much would you like to spend?

Try not to be so verbose with these questions, ok?
Price range:
Under $500 NHT SB-3
$500 - $750 B&W 602S3
$750 - $1000 B&W 602S3 and a 10-12" subwoofer
$1k - $1500 - B&W 605S2 these have built-in powered subs(used or demo)They were $2k new but recently discontinued.
$1500 - $2k Northcreek Rhythm 9500 kit and cabinets if you are handy with tools or can find someone who is to help you.
Here is the link: http://www.northcreekmusic.com/NorthCreekKits.html

$2k - $3K Rhythm 9500 Unlimited Kit or Revelator Kit.

$3.5K NHT T6 system (but only if you don't live in a townhouse or apt).
This system can rock your block.