When looking for emulators to use with any console games, I usually stick with Emulator Zone
They seem pretty trust-worthy because the first thing that is posted on their website is a warning about how this kind of software is kind of risky and there are a lot of fakes out there.
Making that clear from the get go seems pretty sincere to me, whereas sites that trick you into doing surveys and stuff usually don't have banners like that on their homepage.
If you're interested in reading what it says, here's the warning Emulator Zone have up right now:
"Trust only sites that you know (such as us!) and be sure that if such an emulator
is released you will know about it first hand. Do not fall for scams
aimed to trick you into installing a fake program that could very well
include viruses.
Ps: Be wary of PS3 and xbox 360 as well, there are many fake sites and even videos on youtube claiming of such emulators. An example of a working PS3 emulator is RPCS3 which is able to run some simple homebrew games."