The best way to do what you want is with Amithlon, No windows required.
You can set up a HD with amiga OS on it then boot from the Amithlon CD it will automatically detect your HD and boot from it. Or you can set it up to boot from the HD only without the CD.
only... you cant get new CD's any more, but theres bound to be someone willing to sell their original. the mailing list is still active. And there are newkernels in the works for newer mother boards etc.
only #2... there is no AGA or Amiga chipset emulation in Amithlon, but you can run Amiga68K version of UAE to play games ETC.