Problem is you are trying to emulate a pretty recent system. Systems like that and also PS3 are going to cost way more to emulate than they are to buy real hardware (most people already have the hardware and see what they can get away with emulating on it, they don usually buy hardware to specifically emulate a platform), that's just the nature of emulation, NES needed a powerful PC when those emulators first appeared, and things haven't changed in that regard, you need hardware many times more powerful than the hardware you intend to emulate.