Amp to Add Dynamics & Detail to 'Polite' Speakers


I'm looking for an amp that excels in dynamics and detail - I'd like to impart some 'life' or 'zip' into speakers best characterized as a bit 'polite' sounding. Looking for nicely extended highs with slightly lean and tight upper-bass.

I'm taking a little hiatus from tubes, so solid state or class d amps only. I figure around 250 WPC into 4 ohms and around $3k new or used.

What else can be done to push a system in this direction - silver cables?

Thanks for any suggestions.
srosenberg
Find yourself an Acoustat TNT200 and have it rebuilt by Roy Esposito at Sounds Like New in Florida. It'll cost about $1,500 total + shipping and you'll have an amp rivaling anything up to $20,000.00. Characteristics are over the top in what you're asking for with unrivaled bottom end.
What speakers are we talking about? Of course, my experience is very limited, but generally speaking I don't think that you can completely change the character of the speakers by going with a different amp.

Of course, if you speakers are being under driven, that may be a different matter entirely.

So, what speakers are you running?
You may not change their character but you may very well change/realize their potential.
I'm pretty sure I saw a few Krell KAV 250's listed here. I used to have one and liked it very much. It should easily do what you are asking. You can get one for a lot less than your max budget.