Speakers: Color VS. Nuetral

I recently purchased a pair of Dali Euphonia ms4 - 4ohm 350 watt speakers. They play some music great (such as jazz, folk or Dire Straits & Alan Parsons- type music) however they leave me a little flat when I'm playing music of the harder rock variety (Dio, Sammy Hagar, & even Blue Oyster Cult). Like there is a lack of urgency and excitement with these speakers. I'm running them off of a Peachtree Grand which puts out over 600 watts per channel on a 4 ohm speaker.

Would like to know if anyone has an opinion on a good speaker with the right color for this type of sound. Price range would be anywhere from $2000 to $10,000 Msrp when speaker pair was new.