To allocate a budget of $10K for a specific Audio Device that is seemingly not a commonly offered configuration, where DAC - Pre and Streamer are found under the hood does present a risk, that has been identified by the contributors.
There does not seem to be much on offer as a Product in the allocation of budget to be considered. Then there is the buying blind aspect, how does the end user experience the device prior to purchase. This can prove to be a woeful experience.
The general guidance is to steer away from the One Box Wonder and go to Products designed for be very capable and supplied as separate devices.
The trade of is more cases, more cables and power supplies.
The positives are demo's will be found, and used items is an option to keep the end set up close to budget.
This is not a recommendation, but the Product in the Link, might have some of the set up incorporated that you are investigating.