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.
128x128srosenberg
Well i suppose everything is relative. I'm coming from a pair of Wilson speakers and don't find the B&W speakers to be as dynamic and lively.

AC is via 4 dedicated circuits and a running springs conditioner (amps are direct to the wall).

The placette preamp I'm using is the passive version with no compatibility issues in my system that I can tell. I was honestly skeptical at first, but Guy at Placette assured me I wouldn't have any issues given the rest of my system. So I gave it a try and was VERY impressed. It replaced a $5k active preamp.
I heard a Moscode 600 wake up a pair of Von Schwiekert speakers to an extent I did not think possible.
Some people have reported a similar impression w a passive pre-amp. Lots of detail and very transparent but lacking a little something. FWIW,I've heard 802ds driven by Doshi-modified Lectron JH-50 (2 6CA7s a side) and I would not call them polite or laid back at all.