Headroom Max $3000 headphone amp. Opinions anyone?

What cans???

Thanks guys. No, I never use the Max's crossfeed; don't like it.
I use Grado GS1000 'phones.
I also heard some dryness with the Max and my old Senn650s.
The AKG 701s were a somewhat more liquid but the images
are small.
The Grados are way more liquid and the images are big
and well spaced out and have a big, roomy sound that is
different than any other phones I have ever heard. The bass
is great, too. They are much better than the old Grado RS1s
which were to forward and fatigue-inducing. In fact,
they sound very little like the RS1s.
I was curious what a better amp could do for the 1000s,
though my 7-year-old Max (upgraded with the newer reference
module a few years back) seems to do a nice job.
I wanted Audiogon opinions because the folks here
seem really down to earth and make a lot of sense.
Thanks again everbody. Any more comments are welcome.

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Don't discount the Grado RA-1. Despite it's low cost, it is voiced to compliment the 1000's. Frankly, if I were going to spend a lot on an amp for those cans, I would probably look into Woo, as he also uses the big Grados as one of his references. My 2 cents.