NEStopia, VirtuaNES, and FCEUltra are the three best NES emulators. Nothing else comes close. I like VirtuaNES for the video recording capabilities, NEStopia for the downright flawless compatibility, and FCEUltra for ease of configuration/use (I recommend it to people who don't require the features of NEStopia and VirtuaNES)

0.98.13 is the most recent version.