Shadowplay is getting better for caps, but it's much better used for streaming.
As far as quality goes, there's nothing better than fraps; it's a literal frame capture @ lossless (tga)
There's also faststone (which is pretty awesome) and no frills, snagit, tinytake, bandicam
if you're talking streams, there's obs, dxtory, shadowplay, bandicam and precisionX.
