The 9000ES does not have a headphone jack. In fact, very few high end players do. I've had great results with the Shanling T100 (CD only, used price about $1k) and T200 (CD and SACD, used price more like $1,700). The Shanling headphone outs are fed by tubes so you can roll to your heart's delight. But this gets out of your budget.
The HD600's need some juice to drive them well. On an $800 budget, I'd suggest something like the Poineer 47ai universal player (CD, SACD, DVD-A, and DVD) which can be had in the used market here for $400 or so. Then visit www.head-fi.org and spend some time in the forums there to see what you can do with the other $400 for a dedicated headphone amp. You will be surprised at all of the options out there, both new and used.
The HD600's need some juice to drive them well. On an $800 budget, I'd suggest something like the Poineer 47ai universal player (CD, SACD, DVD-A, and DVD) which can be had in the used market here for $400 or so. Then visit www.head-fi.org and spend some time in the forums there to see what you can do with the other $400 for a dedicated headphone amp. You will be surprised at all of the options out there, both new and used.