AmigaForever is a good little package based on WinUAE, It comes supplied with the official Amiga ROMS, both AmigaOS 1.3 environment and the 3.X environment.
Workbench is all setup with a Windows installation program and has a couple of Amiga Apps with it; PPaint etc.
The 1985 Commodore Amiga Launch Video and Dave Haynie's Death Bed Vigil Video is included on the CD too, which is a nice bonus.
More detailed info
here
