Integrated with good headphone output

Hi all,

I recently bought some Grado SR60 headphones and I'm looking for a headphone amp. I got to thinking a budget integrated (3-400) with a good headphone output is more versatile than a dedicated headphone amp. Any ideas? New or used, old or new, whatever.

On a related note, are most headphone outputs on a seperate circuit from the amplifier output section?

Thanks

bmdduck