Emulators to test non-x86 FreeBSD ports?

[C. P. Ghost]

Hello list,

are there any emulators out there that can run the non-x86 versions of FreeBSD
on a FreeBSD/i386 or FreeBSD/amd64 host?

I'm especially interested in trying FreeBSD/sparc64 port, but I'd also like to
test the FreeBSD/powerpc and the FreeBSD/arm ports on an emulator, before
seeking real hardware.

Oh, and btw, what kind of affordable SPARC-based desktops with newish
SPARC processors (i.e. above UltraSparc IIIi) would you recommend for
testing? I've read this page:
  http://www.freebsd.org/platforms/sparc.html
but I'm at a loss as to what vendor, model etc. to get.

Thanks,
-cpghost.

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