Regarding a preference between slot load, drawer, or top load...I think people are forgetting that this is not the golden age of transports where the big companies are making a variety of quality transport mechanisms that are available to sell to specialty companies. Choices are very limited and will have some bearing on the loading type. Unless Schiit commissions something specifically to their standards, but that will be very expensive and require buying in very large quantities. I don't see that happening, but I could be wrong.
The transport can have a significant impact on the BOM costs. In keeping with Schiits philosophy of high value, lower cost products, I'm going to make a guess that the target price of the transport is likely to be in the $350-$700 range. Even $600-$700 is probably too high unless it does something wondrous, even beyond incorporating Unison.
Not knowing what's available in an OEM transport these days, I'm guessing that the main challenge is to find something thats either really good yet affordable, or pretty good and affordable but could be modified or implemented in such a way that it's really good.
In any case, I need a transport and will likely be buying when it first comes available.