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
thanks for the inputs, all... much appreciated. the gear in play is as follows: B&W 802D speakers, Acoustic Zen Satori speaker wires, Acoustic Zen Silver Reference 2 and Acoustic Zen Matrix Reference 2 ICs, Placette preamp.

sorry about the vagueness of the question - i posted to get general thoughts on moving a system in the direction i'm looking for. any further thoughts given how things are configured would be appreciated.
@ Vicadamone...
interesting you mention nCores, as the NC-400 has been reported as a VERY good match for the 802D speaker. if you don't mind, what speakers were you using them with prior to moving them to your studio?

i was a long time tube amp user - Atma-sphere and VAC - but need to goto solid state or class d for domestic considerstions.
Polite is not a description I would associate with 802D's. How's the power supply side, dedicated lines, power cords, conditioning?
That said, the bottom end would not necessarily be characterized as quick and tuneful but capable of delivering a healthy dose of weight.
FWIW I like the W4S ST500 with N802's. British Mag Hi Fi Choice did an article on the 802 Diamonds with some new Musical Fidelity amps that put out somewhere around 600-700 watts ea (I don't recall the model number) and were duly impressed.