I've been trying out MESS's support for N64 and it's at about ~50% speed on my Q6600 @ 3.2ghz and there are some minor graphical glitches. However, given the work going into it, it will probably be the most accurate N64 emulator in a relatively short time unless another contender appears. But it seems like the fascination with N64 emulation has waned, so I doubt it.
I also have to say that I have Project64 1.6 on my 1.2ghz Via C7-M/UniChrome II Pro GPU netbook. It's pretty crap, but amazingly does run Mario 64 playably. Project64 is a good emu, but I like accuracy over enhanced graphics so I'm still holding out hope that MESS's N64 emulation will one day be playable :-D
_ _ - - = = Pr3tty F1y = = - - _ _