What are the best emulators for the Amiga?

[AmigaClassicRule]

I am looking for the most fastest, best emulators for the Amiga 1200, that runs almost 80% and above games with all the graphics and sounds features working.
 
The emulators I am looking for are:
 
1) MSX
2) SNES
3) NES
4) Sega
5) GameBoy
 
 
Thanks in advance.

[AmigaClassicRule]

Thank you all for the help!

@runequester

Right now she have an Apollo 1240 which is really a 68030 @ 30 Mhz with 16 MB of RAM.

I am saving 440 dollars ASIDE each month though for 3 month straight and I am planning on buying a PPC 330 Mhz with 128 MB of RAM with 68060 @ 50 Mhz in the future. Then I am planning on buying AmigaOS 4.1 for the Amiga classic, this is what I am intending to do in the future.