Need recommendation for power amp under $250


I know it's a small budget round' these parts.

I'm looking for a power amp that is extremely natural and clean. I don't need much power as I am driving pretty efficient (90db) speakers, usually at modest listening levels.

I have a fairly good grasp on integrated amps, but power amps seem to have quite a few names I know nothing about.

So, I'm looking for something used under $250... sort of a 'best bang for my buck' thing.

Thanks.
djembeplay
I've got a nicely modded Yamaha M-40 for $185 + shipping? It is switchable 15 watts class A or 135 watts A/B. Simple button on the front does it all. Has dual volume controls and speaker outputs for 2 pair of speakers (my mods eliminated the third pair of speakers).
Email me for pics,
Emery
[email protected]
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Thanks for the recommendations.

Just to make sure I cover my bases, how do Carver, B&K, Adcom, Rotel, and NAD stack up? Is there a clearly higher quality make, or are they all 'vanilla'? It looks like I could pick up any one of those for under $200 used.