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.
puffbojie
Thanks for all the suggestions. I'll have to schedule a field trip to listen to the Aerial collection and check out some other amps for comparison. Have a great weekend. Any others suggestions are certainly welcome.
"Any others suggestions are certainly welcome."

You're making the right decision to go out and demo some new gear. There's no better way to go about this. The only thing that I would add, is that it seems like you may be tempted to keep some of your current equipment, like the Peachtree, maybe because of the reviews, or that you just bought it. Its understandable. No one wants to buy something and have to sell it right away. But if your not objective, and let your emotions play into all of this, it can cost you a lot of money. I know that I can speak for myself on making this mistake, but I'm pretty sure many of the other posters here can as well.
I Demo'd the Peachtree grand amp with my old Kef XQ3 speakers which are about $2k MSRP vs the 9k Dalis and I believe the issue is with the speakers and not the amp. The Dalis are too sophisticated, polite and rounded (at least for that amp) The kefs while smaller, brought back the roar in Billy Squier's "My kind of Lover" Def Leopard's "Photograph " and really brought out Sammy Haggar's, "I'll fall in love again". The Dali's sound much better with Robert Plant solo stuff and a whole slew of "grown up" rock and assorted genres however.

I'm going to need some different speakers to cover more of the bases. Per my budget -Something that would have msrp'd for about 6-7k that is now less $ used. Something that compromises some finesse for an edge on heavier guitar bands and screamers.